Remove unnecessary invocation of updateRotation

mMultiuserReceiver#onReceive will call mSettingsObserver.onChange.
But both mSettingsObserver#updateSettings and
mDefaultDisplayRotation.onUserSwitch() in
mMultiuserReceiver#onReceive already check if there is something
needs to update rotation. So it is unnecessary to call
updateRotation again in mSettingsObserver.onChange.

Bug: 197745994
Test: Switch user
Change-Id: Ic201f319739e910bfb7bf4c9c55a9d687b35cb78

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -824,7 +824,6 @@ public class PhoneWindowManager implements WindowManagerPolicy {
 
         @Override public void onChange(boolean selfChange) {
             updateSettings();
-            updateRotation(false);
         }
     }