Do nothing for ContentResolver.registerContentObserver

ContentResolver.registerContentObserver is called with a user handle
argument from TextClock. We override this version of the method in
BridgeContentResolver to ensure this call does not trigger an exception.

Bug: 150151293
Test: RenderTests.testTextClock added
Change-Id: I33d03f47d90c4dc78e13db91b8905d2196813c58
(cherry picked from commit 4ca6dcadaecc6fcc323548aaede9248fd493ef5f)
3 files changed