bliss: Add support for Gapps and Vanilla variant builds

- Default will be gapps variant
- Disable AOSP Apps on gapps variant
- Add BlissUpdater support for gapps/vanilla variants

Signed-off-by: Jackeagle <jackeagle102@gmail.com>
Change-Id: I405c55b075ab3b367f464aa0e78d730514917e53
5 files changed