diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 8b66928..b350bc2 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -16,6 +16,8 @@
 package android.net;
 
 import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_DEFAULT_MODE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE;
 import static android.net.NetworkRequest.Type.BACKGROUND_REQUEST;
 import static android.net.NetworkRequest.Type.LISTEN;
 import static android.net.NetworkRequest.Type.REQUEST;
@@ -23,8 +25,6 @@
 import static android.net.NetworkRequest.Type.TRACK_DEFAULT;
 import static android.net.NetworkRequest.Type.TRACK_SYSTEM_DEFAULT;
 import static android.net.QosCallback.QosCallbackRegistrationException;
-import static android.provider.Settings.Global.PRIVATE_DNS_DEFAULT_MODE;
-import static android.provider.Settings.Global.PRIVATE_DNS_MODE;
 
 import android.annotation.CallbackExecutor;
 import android.annotation.IntDef;
diff --git a/framework/src/android/net/ConnectivitySettingsManager.java b/framework/src/android/net/ConnectivitySettingsManager.java
index d454365..bbd8393 100644
--- a/framework/src/android/net/ConnectivitySettingsManager.java
+++ b/framework/src/android/net/ConnectivitySettingsManager.java
@@ -16,6 +16,11 @@
 
 package android.net;
 
+import android.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * A manager class for connectivity module settings.
  *
@@ -25,6 +30,196 @@
 
     private ConnectivitySettingsManager() {}
 
+    /** Data activity timeout settings */
+
+    /**
+     * Inactivity timeout to track mobile data activity.
+     *
+     * If set to a positive integer, it indicates the inactivity timeout value in seconds to
+     * infer the data activity of mobile network. After a period of no activity on mobile
+     * networks with length specified by the timeout, an {@code ACTION_DATA_ACTIVITY_CHANGE}
+     * intent is fired to indicate a transition of network status from "active" to "idle". Any
+     * subsequent activity on mobile networks triggers the firing of {@code
+     * ACTION_DATA_ACTIVITY_CHANGE} intent indicating transition from "idle" to "active".
+     *
+     * Network activity refers to transmitting or receiving data on the network interfaces.
+     *
+     * Tracking is disabled if set to zero or negative value.
+     */
+    public static final String DATA_ACTIVITY_TIMEOUT_MOBILE = "data_activity_timeout_mobile";
+
+    /**
+     * Timeout to tracking Wifi data activity. Same as {@code DATA_ACTIVITY_TIMEOUT_MOBILE}
+     * but for Wifi network.
+     */
+    public static final String DATA_ACTIVITY_TIMEOUT_WIFI = "data_activity_timeout_wifi";
+
+    /** Dns resolver settings */
+
+    /**
+     * Sample validity in seconds to configure for the system DNS resolver.
+     */
+    public static final String DNS_RESOLVER_SAMPLE_VALIDITY_SECONDS =
+            "dns_resolver_sample_validity_seconds";
+
+    /**
+     * Success threshold in percent for use with the system DNS resolver.
+     */
+    public static final String DNS_RESOLVER_SUCCESS_THRESHOLD_PERCENT =
+            "dns_resolver_success_threshold_percent";
+
+    /**
+     * Minimum number of samples needed for statistics to be considered meaningful in the
+     * system DNS resolver.
+     */
+    public static final String DNS_RESOLVER_MIN_SAMPLES = "dns_resolver_min_samples";
+
+    /**
+     * Maximum number taken into account for statistics purposes in the system DNS resolver.
+     */
+    public static final String DNS_RESOLVER_MAX_SAMPLES = "dns_resolver_max_samples";
+
+    /** Network switch notification settings */
+
+    /**
+     * The maximum number of notifications shown in 24 hours when switching networks.
+     */
+    public static final String NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT =
+            "network_switch_notification_daily_limit";
+
+    /**
+     * The minimum time in milliseconds between notifications when switching networks.
+     */
+    public static final String NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS =
+            "network_switch_notification_rate_limit_millis";
+
+    /** Captive portal settings */
+
+    /**
+     * The URL used for HTTP captive portal detection upon a new connection.
+     * A 204 response code from the server is used for validation.
+     */
+    public static final String CAPTIVE_PORTAL_HTTP_URL = "captive_portal_http_url";
+
+    /**
+     * What to do when connecting a network that presents a captive portal.
+     * Must be one of the CAPTIVE_PORTAL_MODE_* constants above.
+     *
+     * The default for this setting is CAPTIVE_PORTAL_MODE_PROMPT.
+     */
+    public static final String CAPTIVE_PORTAL_MODE = "captive_portal_mode";
+
+    /**
+     * Don't attempt to detect captive portals.
+     */
+    public static final int CAPTIVE_PORTAL_MODE_IGNORE = 0;
+
+    /**
+     * When detecting a captive portal, display a notification that
+     * prompts the user to sign in.
+     */
+    public static final int CAPTIVE_PORTAL_MODE_PROMPT = 1;
+
+    /**
+     * When detecting a captive portal, immediately disconnect from the
+     * network and do not reconnect to that network in the future.
+     */
+    public static final int CAPTIVE_PORTAL_MODE_AVOID = 2;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(value = {
+            CAPTIVE_PORTAL_MODE_IGNORE,
+            CAPTIVE_PORTAL_MODE_PROMPT,
+            CAPTIVE_PORTAL_MODE_AVOID,
+    })
+    public @interface CaptivePortalMode {}
+
+    /** Global http proxy settings */
+
+    /**
+     * Host name for global http proxy. Set via ConnectivityManager.
+     */
+    public static final String GLOBAL_HTTP_PROXY_HOST = "global_http_proxy_host";
+
+    /**
+     * Integer host port for global http proxy. Set via ConnectivityManager.
+     */
+    public static final String GLOBAL_HTTP_PROXY_PORT = "global_http_proxy_port";
+
+    /**
+     * Exclusion list for global proxy. This string contains a list of
+     * comma-separated domains where the global proxy does not apply.
+     * Domains should be listed in a comma- separated list. Example of
+     * acceptable formats: ".domain1.com,my.domain2.com" Use
+     * ConnectivityManager to set/get.
+     */
+    public static final String GLOBAL_HTTP_PROXY_EXCLUSION_LIST =
+            "global_http_proxy_exclusion_list";
+
+    /**
+     * The location PAC File for the proxy.
+     */
+    public static final String GLOBAL_HTTP_PROXY_PAC = "global_proxy_pac_url";
+
+    /** Private dns settings */
+
+    /**
+     * The requested Private DNS mode (string), and an accompanying specifier (string).
+     *
+     * Currently, the specifier holds the chosen provider name when the mode requests
+     * a specific provider. It may be used to store the provider name even when the
+     * mode changes so that temporarily disabling and re-enabling the specific
+     * provider mode does not necessitate retyping the provider hostname.
+     */
+    public static final String PRIVATE_DNS_MODE = "private_dns_mode";
+
+    /**
+     * The specific Private DNS provider name.
+     */
+    public static final String PRIVATE_DNS_SPECIFIER = "private_dns_specifier";
+
+    /**
+     * Forced override of the default mode (hardcoded as "automatic", nee "opportunistic").
+     * This allows changing the default mode without effectively disabling other modes,
+     * all of which require explicit user action to enable/configure. See also b/79719289.
+     *
+     * Value is a string, suitable for assignment to PRIVATE_DNS_MODE above.
+     */
+    public static final String PRIVATE_DNS_DEFAULT_MODE = "private_dns_default_mode";
+
+    /** Other settings */
+
+    /**
+     * The number of milliseconds to hold on to a PendingIntent based request. This delay gives
+     * the receivers of the PendingIntent an opportunity to make a new network request before
+     * the Network satisfying the request is potentially removed.
+     */
+    public static final String CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS =
+            "connectivity_release_pending_intent_delay_ms";
+
+    /**
+     * Whether the mobile data connection should remain active even when higher
+     * priority networks like WiFi are active, to help make network switching faster.
+     *
+     * See ConnectivityService for more info.
+     *
+     * (0 = disabled, 1 = enabled)
+     */
+    public static final String MOBILE_DATA_ALWAYS_ON = "mobile_data_always_on";
+
+    /**
+     * Whether the wifi data connection should remain active even when higher
+     * priority networks like Ethernet are active, to keep both networks.
+     * In the case where higher priority networks are connected, wifi will be
+     * unused unless an application explicitly requests to use it.
+     *
+     * See ConnectivityService for more info.
+     *
+     * (0 = disabled, 1 = enabled)
+     */
+    public static final String WIFI_ALWAYS_REQUESTED = "wifi_always_requested";
+
     /**
      * Whether to automatically switch away from wifi networks that lose Internet access.
      * Only meaningful if config_networkAvoidBadWifi is set to 0, otherwise the system always