Ignore the live tile app for accessibility

Fixes: 131134063
Fixes: 131124767
Fixes: 131130071
Fixes: 131123026
Fixes: 131122615
Fixes: 131125826
Test: Turn on talkback and live tile. Swipe up from an app, and make
sure that talkback can no longer interact with the live tile app.

Change-Id: I94803832a94143f4b41f5f4e7451152bb4ccdab3