Send broadcast when default dialer changes

Add hidden TelecomManager.setDefaultDialer for system apps
to set the default dialer and trigger the broadcast

Bug: 21846308
Change-Id: Ifdd30cd1323ab0157edf7fd966173b6c52df6ba0
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index a434a13..65c064b 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -289,6 +289,8 @@
     <protected-broadcast android:name="android.location.GPS_FIX_CHANGE" />
     <protected-broadcast android:name="android.net.proxy.PAC_REFRESH" />
 
+    <protected-broadcast android:name="android.telecom.action.DEFAULT_DIALER_CHANGED" />
+
     <protected-broadcast
         android:name="com.android.server.connectivityservice.CONNECTED_TO_PROVISIONING_NETWORK_ACTION" />