LockscreenTile : Don't rely on DEVICE_POLICY broadcast

The current trigger used for initialization is too finicky and doesn't
work on some devices. Switch to trigger based on instantiation of the service
inside the delegate instead.

Also fix inverted drawable state.

Change-Id: I8439ed50281de805ae68fe7b5a81220475d98022
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0