Send broadcast to pkg installers on config change

Send a protected system broadcast to apps that hold
the INSTALL_PACKAGES permission whenever a change to
properties like locale or display density happens.

Receivers can be registered in the manifest, and a process
will be woken up to receive the broadcast.

This will happen rarely, since the configuration changes
eligible to trigger this broadcast are rare themselves.

Bug: 63918966
Test: manual

Change-Id: I817a51ea05f762e02561691825d57d643db7dc30
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index deefddb..af4a90c 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -53,6 +53,7 @@
     <protected-broadcast android:name="android.intent.action.UID_REMOVED" />
     <protected-broadcast android:name="android.intent.action.QUERY_PACKAGE_RESTART" />
     <protected-broadcast android:name="android.intent.action.CONFIGURATION_CHANGED" />
+    <protected-broadcast android:name="android.intent.action.SPLIT_CONFIGURATION_CHANGED" />
     <protected-broadcast android:name="android.intent.action.LOCALE_CHANGED" />
     <protected-broadcast android:name="android.intent.action.BATTERY_CHANGED" />
     <protected-broadcast android:name="android.intent.action.BATTERY_LOW" />