Default launch image theme fallback is black to prevent stretch/squash of the image if started in wrong orientation
#jira UE-21702
#ue4
#android
[CL 2714961 by Chris Babcock in Main branch]
- Code additions to download data from Google Play Store if not on device
- Changes deploy to write new meta-data
- Changes to Android deploy to cache ini files once and re-read instead of the constant open/read we had
- Added template/code generation system so we can now generate Java files based on a template for project dependent names etc
[CL 2521147 by Robert Jones in Main branch]
