LocationManager: Hide location provider and geocode provider APIs.

Also rename Geocoder.isImplemented() to Geocoder.isPresent()

BUG: 3000738
BUG: 3001413

Change-Id: I56bb4e9a9c59f8b79de585eeb168f74c3ff1a853
Signed-off-by: Mike Lockwood <lockwood@android.com>

services/java/com/android/server/LocationManagerService.java

@@ -1959,7 +1959,7 @@ public class LocationManagerService extends ILocationManager.Stub implements Run
 
     // Geocoder
 
-    public boolean geocoderIsImplemented() {
+    public boolean geocoderIsPresent() {
         return mGeocodeProvider != null;
     }