Prevent overlay drawing on top of Bluetooth discovery request dialog am:...

Prevent overlay drawing on top of Bluetooth discovery request dialog am: ac671004 am: 2094f016 am: 0b7ce766 am: fa8d015b am: 682c00d8 am: 62ec2b5a am: 01251764 am: 3afa3cd4 am: 00950b7d am: ea59fa2f

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

Change-Id: Ic7b3f5f974075d9539f690348434ba5e19887c35