In LocationManagerService if a LocationListener is removed while it has
a pending broadcast the wake lock held while pending broadcasts are
outstanding do not get cleared properly.
There are 2 cases of this race that are fixed:
1. locationCallbackFinished was changed to check the mReceivers HashMap
directly instead of calling getReceiver. getReceiver would add the
ILocationListener as a new Receiver if it did not exist which caused
a receiver that was removed when it still had a broadcast pending to
be added back in a bad state when the pending broadcast completed.
2. removeUpdatesLocked was changed to decrement the pending broadcasts
when a Receiver is removed that has pending broadcasts.
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.
BUG=1752566
Automated import of CL 144256
