Merge "Fix talkback. Announce Files appname by explicitly call View.announceForAccessibility. To prevent announcing twice, only do this when first launch." into rvc-dev am: 68392ec4 am: d1c84532 am: db8320ef am: 3025e008

Change-Id: I7c7028c7a9e362af0f275492b87d5f41f45297ee