Prevent overlay drawing on top of Bluetooth discovery request dialog am: ac67100423 am: 2094f01676 am: 0b7ce7660c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/11484057

Change-Id: I558bc394013060be07bc4fb76b0e394f8b1e513b