Add 0,0 location check

Ignore 0,0 locations from any real provider.

Test: n/a
Bug: 142977619
Change-Id: Ia3fd9712b6a8b3881ebfe2b29279700fa4b32d0f

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

@@ -1000,6 +1000,12 @@ public class LocationManagerService extends ILocationManager.Stub {
 
         @Override
         public void onReportLocation(Location location) {
+            // likelihood of a 0,0 bug is far greater than this being a valid location
+            if (!isMock() && location.getLatitude() == 0 && location.getLongitude() == 0) {
+                Slog.w(TAG, "blocking 0,0 location from " + mName + " provider");
+                return;
+            }
+
             synchronized (mLock) {
                 handleLocationChangedLocked(location, this);
             }