Add the OTA updater

Change-Id: I544203a26f13f0723d0e96add249160cb606cf9a
Enable "sync -c" default for repo

There's no need to fetch every single branch

Change-Id: I48861c2b46e5d9d94c478fa78e2724546f71ddf1
Update gerrit location in manifest and docs

Change-Id: I5121761af6b778415aeb6b9722674f555bcabd28
Use frameworks/media/libvideoeditor from CM

Change-Id: I938bdc9335b26fe1f9cec5fed41489696f5a9a30
README.mkdn fix