* NotificationAccessConfirmationActivity (triggered through CompanionDeviceManager) -> Don't show the dialog, bail out early similarly to other invalid inputs.
* NotificationAccessSettings (from Special App Access) -> No changes, but use the canonical constant now.
* ApprovalPreferenceController (used in NotificationAccessDetails) -> Disable the toggle, unless the NLS was previously approved (in which case it can still be removed).
Fixes: 260570119
Fixes: 286043036
Test: atest + manually
Change-Id: Ifc048311746c027e3683cdcf65f1079d04cf7c56
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