Expose CONNECTIVITY_ACTION to Instant Apps

Clean cherry-pick of ag/3710436

Test: Broadcast is visible to Instant Apps
Bug: 69421898
Change-Id: Ibac92b5aa16bf1538776b90df5dc05362667e785
Merged-In: I0434f8c7292a85e25df3da2858e4d89cf55fab3d
Merged-In: I62ed2107d0b0712267a903e465cbeba6a4f0b346

services/core/java/com/android/server/ConnectivityService.java

@@ -1738,6 +1738,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
                             ni != null ? ni.getState().toString() : "?");
                 } catch (RemoteException e) {
                 }
+                intent.addFlags(Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS);
             }
             try {
                 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options);