Skip updating mode list entries for unchanged modes

Bug: 357861830
Test: manual, with debugger
Flag: android.app.modes_ui
Change-Id: Ieaea5053d1e8e3bc4052af1f961470eb8211192f

src/com/android/settings/notification/modes/ZenModesListItemPreference.java

@@ -67,7 +67,12 @@ class ZenModesListItemPreference extends RestrictedPreference {
     }
 
     public void setZenMode(ZenMode zenMode) {
+        ZenMode previous = mZenMode;
         mZenMode = zenMode;
+        if (zenMode.equals(previous)) {
+            return;
+        }
+
         setTitle(mZenMode.getName());
         CharSequence statusText = switch (mZenMode.getStatus()) {
             case ENABLED_AND_ACTIVE ->