[Suggestion] Add listener to check user approval change

Add  listener for apps to check the user approval status changes.

Bug: 160648511
Test: atest com.android.server.wifi
Change-Id: I4a6299c3fabbcd9a924231a9481a632c0ea04aa2
5 files changed
tree: 897bc46822f6ff9937d2570660e24f6f87801ec8
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg