Fix for Issue 805: Make baeUrlOverride() public (#806)

Author: CarlRobinsonRAM

src/main/java/com/google/maps/GeoApiContext.java

@@ -415,7 +415,7 @@ public Builder requestHandlerBuilder(RequestHandler.Builder builder) {
      * @param baseUrl The URL to use, without a trailing slash, e.g. https://maps.googleapis.com
      * @return Returns this builder for call chaining.
      */
-    Builder baseUrlOverride(String baseUrl) {
+    public Builder baseUrlOverride(String baseUrl) {
       baseUrlOverride = baseUrl;
       return this;
     }