Application restrictions API

Adds the ability for apps to export some restrictions. The restrictions
are presented in Settings based on the restriction type. The user's
selections are stored by UserManagerService and provided to the
target user's application as a list of RestrictionEntry objects which
contain the key, value(s).

Also introduce a manifest entry for system apps to request that the
app be automatically installed in all users, so that they cannot be
deselected by the owner user.

Shared account filtering for non-whitelisted apps.

Change-Id: I15b741e3c0f3448883cb364c130783f1f6ea7ce6
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index 53c47d2..e1461e3 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -2415,6 +2415,15 @@
             "android.intent.action.PRE_BOOT_COMPLETED";
 
     /**
+     * Broadcast to a specific application to query any supported restrictions to impose
+     * on restricted users. The response should contain an extra {@link #EXTRA_RESTRICTIONS}
+     * which is of type <code>ArrayList&lt;RestrictionEntry&gt;</code>.
+     * @see RestrictionEntry
+     */
+    public static final String ACTION_GET_RESTRICTION_ENTRIES =
+            "android.intent.action.GET_RESTRICTION_ENTRIES";
+
+    /**
      * Sent the first time a user is starting, to allow system apps to
      * perform one time initialization.  (This will not be seen by third
      * party applications because a newly initialized user does not have any
@@ -3146,6 +3155,12 @@
     public static final String EXTRA_USER_HANDLE =
             "android.intent.extra.user_handle";
 
+    /**
+     * Extra used in the response from a BroadcastReceiver that handles
+     * {@link #ACTION_GET_RESTRICTION_ENTRIES}.
+     */
+    public static final String EXTRA_RESTRICTIONS = "android.intent.extra.restrictions";
+
     // ---------------------------------------------------------------------
     // ---------------------------------------------------------------------
     // Intent flags (see mFlags variable).