am 501cdb21: am 3efb37d2: am 636e6b73: Minor tweak to screen dimming policy.

        // Apply dimming by at least some minimum amount when user activity

        // timeout is about to expire.

        if (mPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) {

            if (brightness > mScreenBrightnessRangeMinimum) {

                brightness = Math.max(Math.min(brightness - SCREEN_DIM_MINIMUM_REDUCTION,

                        mScreenBrightnessDimConfig), mScreenBrightnessRangeMinimum);

            }

            if (!mAppliedDimming) {

                slowChange = false;

            }