Cleanup CM stuff

Sync 16 by default

Removed:
- Readme
- CM Updater
- CM Wallpapers
- Lock Clock (cLock)
- Legacy Prebuilts
- Darwin Prebuilts
- vendor_cyngn

Change-Id: I9aae1e4cd2c9dff53d61c5f15db838cec71080cd
Track my packages

Change-Id: I72f2349a93fdbe2840055a7a490213afcba53e0a