Merge "Revert "Hide non-system overlay window on ActivityPicker"" into pi-dev...

Merge "Revert "Hide non-system overlay window on ActivityPicker"" into pi-dev am: bcc7f89f am: 89d14a36 am: 30ab86df am: 767f72b0 am: fe3572be am: 2a20e51f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/14103366

Change-Id: I415c89bf591503bc8b1dbff8e0f13da03db309fd