Set the appliance (tv/watch) in the configuration earlier

Some UI is displayed (boot/optimizing) before the configuration
has been completely set. This noteably happens for watches and
TVs because UIModeManagerService hasn't started yet.

UIModeManagerService is started earlier, and its dependency
TwilightService is loaded during the "all system services ready"
boot phase.

b/18388692

Change-Id: Iabdf8ac3eb04ebcb44779d752e19042769cc65c6