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 am: be186dc3

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ifab96b3897510a77e23ed02b3c0cb8ca57d21b65