Prevent overlay drawing on top of Bluetooth pairing dialog am: 3f5bf02f am: a0c963ba am: 368fc30e am: 988d9633

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/11484056

Change-Id: I531919ef123c1aa829a26a595fcf0d6544ef2578