draw-wakelock: disable draw wakelock to limit aod animation

DRAW_WAKE_LOCK is an internal wakelock that is acquired per frame while
DOZE. It was added for ambient transition and per-minute
screen change. However, an loop transition animation could extend the
wakelock infiintely which drains the battery. Since Wear SystemUI now
can manage the animation allowing window by itself, DRAW_WAKE_LOCK will
be disabled starting U.

Flag: android.view.flags.disable_draw_wake_lock
Test: go/verification-limit-aod-animation
Bug: 349153669
Change-Id: Id67cdcd6f22bb8fd3e2db23346d8004da351c54d