[CM] Remove maximum timeout value for request network

The request network with timeout was originally created with a
check of max timeout against a constant of 100 minutes. However,
the API was not public and did not implement a timeout. Any users
were internal and never got any onUnavailable() callback (since
timeout never triggered).

There is no reason to have a max timeout so the constant is
remove.

Bug: 31399536
Test: unit tests and CTS of ConnectivityManager
Change-Id: Icbedfb4299d75b6a7e3e43720111531f1faafd06
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 82e3093..5d4f5e0 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -2968,8 +2968,8 @@
      *
      * This function behaves identically to the non-timedout version, but if a suitable
      * network is not found within the given time (in milliseconds) the
-     * {@link NetworkCallback#unavailable} callback is called.  The request must
-     * still be released normally by calling {@link unregisterNetworkCallback(NetworkCallback)}.
+     * {@link NetworkCallback#onUnavailable()} callback is called.  The request must
+     * still be released normally by calling {@link #unregisterNetworkCallback(NetworkCallback)}.
      *
      * <p>This method requires the caller to hold either the
      * {@link android.Manifest.permission#CHANGE_NETWORK_STATE} permission
@@ -2981,10 +2981,7 @@
      *                        the callbacks must not be shared - they uniquely specify
      *                        this request.
      * @param timeoutMs The time in milliseconds to attempt looking for a suitable network
-     *                  before {@link NetworkCallback#unavailable} is called.
-     *
-     * TODO: Make timeouts work and then unhide this method.
-     *
+     *                  before {@link NetworkCallback#onUnavailable()} is called.
      * @hide
      */
     public void requestNetwork(NetworkRequest request, NetworkCallback networkCallback,
@@ -2994,13 +2991,6 @@
     }
 
     /**
-     * The maximum number of milliseconds the framework will look for a suitable network
-     * during a timeout-equiped call to {@link requestNetwork}.
-     * {@hide}
-     */
-    public final static int MAX_NETWORK_REQUEST_TIMEOUT_MS = 100 * 60 * 1000;
-
-    /**
      * The lookup key for a {@link Network} object included with the intent after
      * successfully finding a network for the applications request.  Retrieve it with
      * {@link android.content.Intent#getParcelableExtra(String)}.
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index dfca02e..6266a39 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -4163,7 +4163,7 @@
         }
         ensureRequestableCapabilities(networkCapabilities);
 
-        if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) {
+        if (timeoutMs < 0) {
             throw new IllegalArgumentException("Bad timeout specified");
         }