Jose Lima 34ff492978 Fixes for a few bugs related to visible-behind activities
- Allow activities currently not visible to switch back to not
     visible-behind state.
   - Do not allow an activity that is not set as the visible-behind
     activity to cancel the visible-behind state.
   - Immediately mark a finishing activity as no longer visible behind.

Bug: 17070266
Change-Id: I2c5016793e5264013b8a54b84098e6ffae34ae6c
2014-08-19 23:20:51 +00:00
..
2014-08-18 22:01:43 +00:00