- setDeviceOwner() now takes a user ID. (We can infer it from Binder, but
we still need it for the dpm command.)
- Change broadcast target UID for DO to the DO user
- Start the DO user on boot complete.
TODO Investigate whether this is actually the good timing.
TODO Prevent the DO user from being killed
Bug 23827706
Change-Id: I227dbd444f1f4e94d98c317489d151554fe79d91