OTAPlatform: add overlays and build from source
Not yet ready for this

Needs some more testing and perhaps source refactoring

Change-Id: I5fe2c68af4fa4a02656518d6e0edc4375572bff2
Remove OTAUpdater references
Merge branch 'jellybean' of github.com:ParanoidAndroid/android_vendor_pa into jellybean