Merge changes I8f62ce28,I1a5f4319,I210d7538 into rvc-dev

* changes:
  WifiScanningServiceImpl: Clear calling identity before location check
  WifiConfigManager: Fix ConcurrentModificationException on user switch
  WifiSettingsConfigStore: Rework to add type safety
tree: 67e60eabe029f8b9023445e73e26bb5124e2b13c
  1. apex/
  2. service/
  3. PREUPLOAD.cfg