Prevent non-system overlays from showing over notification listener consent dialog
Bug: 170731783
Test: use a visible overlay, ensure it's gone when notification consent is open
Change-Id: I58e017982f385ffc0d0ba2174512490b1d83dd36
Bug: 63405718
Test: Ensute that the notification access dialog is not dismissable with
either back button or touch outside
Change-Id: I613da247a2adc0571478f649a2191cd5840359f0
Test: 1. Trigger the confitrmation dialog.
Ensure it looks exactly like the one from settings.
2. Call an API without associating the appa first
Ensure exception is thrown with a message mentioning the need to associate 1st
Change-Id: I0b280e9bcef7f9d21ce7c9dfeaf2703945481efd
