Remove Flags from WifiTrackerLib

Trunk stable flagging is not available in google3, which means we need
to remove these from WifiTrackerLib for our google3 clients (SUW).
Instead, wrap these with NonSdkApiWrapper.

Bug: 293946849
Test: atest HotspotNetworkEntryTest
Change-Id: Ie236a20c264cc207e8bdc2bdc42bb79b788aee68
5 files changed