Make FIREWALL_CHAIN_OEM_DENY API

Bug: 208371987
Test: m
Change-Id: Ie0c2ad862c02f9fd4561869cf5a1adc44f1be11b
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 5769b92..1b0578f 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -997,6 +997,7 @@
      * Denylist of apps that will not have network access due to OEM-specific restrictions.
      * @hide
      */
+    @SystemApi(client = MODULE_LIBRARIES)
     public static final int FIREWALL_CHAIN_OEM_DENY_1 = 7;
 
     /**
@@ -1004,6 +1005,7 @@
      * Denylist of apps that will not have network access due to OEM-specific restrictions.
      * @hide
      */
+    @SystemApi(client = MODULE_LIBRARIES)
     public static final int FIREWALL_CHAIN_OEM_DENY_2 = 8;
 
     /**
@@ -1011,6 +1013,7 @@
      * Denylist of apps that will not have network access due to OEM-specific restrictions.
      * @hide
      */
+    @SystemApi(client = MODULE_LIBRARIES)
     public static final int FIREWALL_CHAIN_OEM_DENY_3 = 9;
 
     /** @hide */