Merge "Protect account chooser activities against overlay." into qt-dev am:...

Merge "Protect account chooser activities against overlay." into qt-dev am: 7f2257fa am: 683623e8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13191817

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9307ed863c033d169fb91994e976a94ca9267bf0