SystemUI: more consistent nav tinting behavior

Change-Id: If4415e717340d15addb954e385cd2ac2fd6ba12d
Signed-off-by: Roman Birg <romanbirg@gmail.com>
SystemUI: fire off intent to preload along with first task
and clean up
Seems to help bring it up faster~

Change-Id: I2115ad42a2fca4473f22a65ebfcdc20ac21bde5b
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Fix reboot dialog causing hot reboot if user long presses power button more than once.

Change-Id: I7c41f4d9bc1c264d063cc5302678ee5079013540