-Go through major javadocs for location APIs and update and normalize
them, inserting additional information where necessary.
-Deprecated requestSingleUpdate APIs as they are dangerous (may be
adding a more direct replacement getCurrentLocation() later in R).
-Drop support for GpsStatusListener APIs (deprecated many years ago) for
apps targeting R and above.
-Drop permissions check from location provider properties APIs, there
doesn't seem to be any reason for these to be secured.
Bug: 141774342
Test: manual
Change-Id: I847f395e1e869eec991613b9b1b7e94a655446cc
d4bbee27e7