Add reason to exit the emergency callback mode

This commit adds reason to exit the emergency callback mode.
- reason: TelephonyManager.STOP_REASON_USER_ACTION
Plus, The EmergencyStateTracker.make method is called with FeatureFlags
provided as an argument.

Bug: 359064059
Test: atest
Flag: com.android.internal.telephony.flags.emergency_callback_mode_notification
Change-Id: Id6f57737b97cde125ff7213a356df4693eede780
2 files changed