Add version control ignore

vcs.xml can be considered for gitignore as per this [stackoverflow discussion](https://stackoverflow.com/questions/16736856/what-should-be-in-my-gitignore-for-an-android-studio-project/18454251#18454251)

Android.gitignore

@@ -65,3 +65,6 @@ fastlane/Preview.html
 fastlane/screenshots
 fastlane/test_output
 fastlane/readme.md
+
+# Version control
+vcs.xml