Add new API to propagate contextual data to the assist action

When launching an assist, we have a new API allowing the
current foreground activity/application to provide additional
arbitrary contextual information that is stuffed in the
assist intent before it is launched.

Change-Id: I0b2a6f5a266dc42cc0175327fa76774f814af3b4
diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index 14fe6af..b85121e 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -49,7 +49,8 @@
     <uses-permission android:name="android.permission.SET_SCREEN_COMPATIBILITY" />
     <uses-permission android:name="android.permission.START_ANY_ACTIVITY" />
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL" />
-
+    <uses-permission android:name="android.permission.GET_TOP_ACTIVITY_INFO" />
+    
     <!-- WindowManager -->
     <uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />