Remove LocationManager#getLastKnownLocation(Criteria).

This was never a public API, so we don't need to follow
an orderly deprecation. And it breaks a CTS test:

cts/tests/tests/location/src/android/location/cts/LocationManagerTest.java:521: reference to getLastKnownLocation is ambiguous, both method getLastKnownLocation(java.lang.String) in android.location.LocationManager and method getLastKnownLocation(android.location.Criteria) in android.location.LocationManager match
            mManager.getLastKnownLocation(null);
                    ^

Change-Id: I503267e4fa577ce4bf684239da777f11b0e511f5