Add handler variant of registerDefaultNetworkCallback to shadow

This adds the variant that takes a Handler. In the shadow it functions identically to the variant without the Handler.

PiperOrigin-RevId: 634712221

robolectric/src/test/java/org/robolectric/shadows/ShadowConnectivityManagerTest.java

@@ -385,6 +385,14 @@ public void registerDefaultCallback_shouldAddCallback() {
     assertThat(shadowOf(connectivityManager).getNetworkCallbacks()).hasSize(1);
   }
 
+  @Test
+  @Config(minSdk = O)
+  public void registerDefaultCallback_withHandler_shouldAddCallback() {
+    ConnectivityManager.NetworkCallback callback = createSimpleCallback();
+    connectivityManager.registerDefaultNetworkCallback(callback, new Handler());
+    assertThat(shadowOf(connectivityManager).getNetworkCallbacks()).hasSize(1);
+  }
+
   @Test
   @Config(minSdk = S)
   public void registerBestMatchingNetworkCallback_shouldAddCallback() {

shadows/framework/src/main/java/org/robolectric/shadows/ShadowConnectivityManager.java

@@ -153,6 +153,12 @@ protected void registerDefaultNetworkCallback(
     networkCallbacks.add(networkCallback);
   }
 
+  @Implementation(minSdk = O)
+  protected void registerDefaultNetworkCallback(
+      ConnectivityManager.NetworkCallback networkCallback, Handler handler) {
+    networkCallbacks.add(networkCallback);
+  }
+
   @Implementation(minSdk = S)
   protected void registerBestMatchingNetworkCallback(
       NetworkRequest request,