GeoLocation timeout never called on android

Summary:Don't add systems current time to the `timeout` option. This is already correct on iOS.
Closes https://github.com/facebook/react-native/pull/6376

Differential Revision: D3053728

Pulled By: mkonicek

fb-gh-sync-id: 919068659d0d23906d8a6d85df7819296460b719
shipit-source-id: 919068659d0d23906d8a6d85df7819296460b719

ReactAndroid/src/main/java/com/facebook/react/modules/location/LocationModule.java

@@ -280,7 +280,7 @@ public class LocationModule extends ReactContextBaseJavaModule {
 
     public void invoke() {
       mLocationManager.requestSingleUpdate(mProvider, mLocationListener, null);
-      mHandler.postDelayed(mTimeoutRunnable, SystemClock.currentTimeMillis() + mTimeout);
+      mHandler.postDelayed(mTimeoutRunnable, mTimeout);
     }
   }
 }