update Google Maps API key reference in AndroidManifest.xml

Author: Mozart299

mobile-v3/android/app/src/main/AndroidManifest.xml

@@ -10,7 +10,7 @@
 
         <!-- TODO: Add your Google Maps API key here -->
         <meta-data android:name="com.google.android.geo.API_KEY"
-            android:value="${MAPS_API_KEY}" />
+            android:value="${googleMapsKey}" />
 
         <!-- Google Places API key -->
         <meta-data