LocationManagerService now listens for changes to settings,
making LocationManager.updateProviders() unnecessary.
Removed LocationManager.updateProviders()
Added Settings.Secure.setLocationProviderEnabled(), which is a thread-safe way
of enabling or disabling a single location provider.
This is safer than reading, modifying and writing the LOCATION_PROVIDERS_ALLOWED directly.
BUG=1729031
Original author: lockwood
Automated import of CL 144415
Added a screen to the setup wizard, after login, to ask user to
opt-in for location collection.
Added a dialog to Settings when user turns on Network location.
Fixed a security permission issue in LocationManagerService related
to this change.
Original author: yamasani
Merged from: //branches/cupcake/...
Original author: android-build
Automated import of CL 144395
