Merge "Prevent apps to overlay other apps via toast windows" into nyc-mr1-dev...
Merge "Prevent apps to overlay other apps via toast windows" into nyc-mr1-dev am: cbfd373d am: 4ff27f97
am: 220d356d
Change-Id: Icdca6d785f079114ea4b4ec2ee2990d42ea1e06f