Reload brightness setting on user switch.

Bug: 73147707
Test: manual, switch user set max brightness, switch back brightness unchanged.
Change-Id: I09f350eb175e37ff4bf951afc67bc53d171739b1

services/core/java/com/android/server/display/DisplayPowerController.java

@@ -500,6 +500,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
     }
 
     public void onSwitchUser(@UserIdInt int newUserId) {
+        handleSettingsChange();
         mBrightnessTracker.onSwitchUser(newUserId);
     }