Update flicker app targetSDK

So that AE is enabled on phone target as well

Update the following:
1. PendingIntent requires FLAG_MUTABLE
2. Bubble/Notification requires POST_NOTIFICATIONS
3. registerReceiver requires RECEIVER_EXPORTED
4. Opt-out force edge-to-edge

Bug: 306666082
Test: atest FlickerTestsOther
Change-Id: Ib1c310795ee3723656c9ebd0557831d189eddb6c