Finish bring up

- Build CellBroadcastReceiver
- Replace Launcher2 w/ Launcher3 & remove QuickSearchBox
- add PRODUCT_BUILD_PROP_OVERRIDES
- Remove deprecated Music package
- Remove optional "Home Sample" Launcher

and more...

Change-Id: Ic8f707e7c2f492812648a4a5c3cc0b22af5fbb08