Merge cherrypicks of [9256783, 9255501, 9255502, 9256667, 9256422, 9256668] into qt-c2f2-release

        if (mScreenBrightnessBoostInProgress) {

            return true;

        }

        // Because summoning the sandman is asyncronous, there is a time-gap where

        // we release the display suspend blocker before the dream service acquires

        // their own wakelock.  Within this gap, we can end up suspending before

        // dream service has a chance to start.  To avoid this, we check if we want

        // to doze and the sandman is scheduled and if so, keep the display on until

        // that has passed.

        if (mWakefulness == WAKEFULNESS_DOZING && mSandmanScheduled) {

            return true;

        }

        // Let the system suspend if the screen is off or dozing.

        return false;

    }