Enable easy and deterministic debug bundle

This enables non-eng people to test the feature with notify or other
apps deterministically by using the following command:

`adb shell setprop persist.debug.notification_bundle_ui_debug_app_name com.google.cinek.notify && adb reboot`

Test: Tested manually. Command and debug bundle.
Bug: b/389839492
Flag: com.android.systemui.notification_bundle_ui
Change-Id: Icb446848d61511dabea985222f252d1d9489afbb