[Suggestion] Add shell commands to allow add carrier suggestion

1. Command to allow shell work as a cross carrier provider
2. Command to add carrier network suggestion
3. Command to remove the shell app from WifiNetworkSuggestionManager

Bug: 172867186
Test: atest com.android.server.wifi. Manually shell test.
Change-Id: Ibd3f3678b71e089d518ceb3f76a939384503a50f
3 files changed
tree: c29d1af7a120d7c3c681c24ff865e314c875cfe4
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg