Guard against duplicate calls to setQuietModeEnabled

check if quiet mode is already in the desired state before calling
setQuietModeEnabled

Bug: 303722527
Bug: 293441361
Test: atest WorkModePreferenceControllerTest, atest
ManagedProfileQuietModeEnablerTest

Change-Id: I6a809b6f1b9a78382dccb1cc8b0ae4d8c88fa51a

src/com/android/settings/accounts/WorkModePreferenceController.java

@@ -70,6 +70,9 @@ public class WorkModePreferenceController extends BasePreferenceController
     @Override
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
         mQuietModeEnabler.setQuietModeEnabled(!isChecked);
+        if (android.app.admin.flags.Flags.quietModeCredentialBugFix()) {
+            updateState(mPreference);
+        }
     }
 
     @Override