Use context's userId in ContentResolver class.

- When registering and notifying observers, we should use the user in the
context as opposed to current user.
- Relax the permission check while registering and notifying content observers
to use INTERACT_ACROSS_USERS instead of INTERACT_ACROSS_USERS_FULL permission.

Change-Id: I973936903d4a2272c5722f3b98a057a40c0402be
Fixes: 32955100
Test: Created managed profile and verified that there are not failures.
      runtest -x core/tests/coretests/src/android/content/SecondaryUserContentResolverTest.java
      runtest -x core/tests/coretests/src/android/content/ManagedUserContentResolverTest.java

core/java/android/content/ContentResolver.java

@@ -1886,7 +1886,7 @@ public abstract class ContentResolver {
                 ContentProvider.getUriWithoutUserId(uri),
                 notifyForDescendants,
                 observer,
-                ContentProvider.getUserIdFromUri(uri, UserHandle.myUserId()));
+                ContentProvider.getUserIdFromUri(uri, mContext.getUserId()));
     }
 
     /** @hide - designated user version */
@@ -1956,7 +1956,7 @@ public abstract class ContentResolver {
                 ContentProvider.getUriWithoutUserId(uri),
                 observer,
                 syncToNetwork,
-                ContentProvider.getUserIdFromUri(uri, UserHandle.myUserId()));
+                ContentProvider.getUserIdFromUri(uri, mContext.getUserId()));
     }
 
     /**
@@ -1982,7 +1982,7 @@ public abstract class ContentResolver {
                 ContentProvider.getUriWithoutUserId(uri),
                 observer,
                 flags,
-                ContentProvider.getUserIdFromUri(uri, UserHandle.myUserId()));
+                ContentProvider.getUserIdFromUri(uri, mContext.getUserId()));
     }
 
     /**