Disable DND status change notification on watches.

Added a check to the showZenUpgradeNotification logic to detect the
presence of a watch.
Reupload of ag/4436427 which was reverted (ag/4466787) because I forgot to get
approvals from main Android team.

Bug: 74178001
Test: Flashed image to watch, saw expected behavior
Change-Id: If88df0fe2f3ecd0d6e075d56747ba32213bb2131

services/core/java/com/android/server/notification/ZenModeHelper.java

@@ -1182,11 +1182,19 @@ public class ZenModeHelper {
     }
 
     private void showZenUpgradeNotification(int zen) {
+        final boolean isWatch = mContext.getPackageManager().hasSystemFeature(
+            PackageManager.FEATURE_WATCH);
         final boolean showNotification = mIsBootComplete
                 && zen != Global.ZEN_MODE_OFF
+                && !isWatch
                 && Settings.Global.getInt(mContext.getContentResolver(),
                 Settings.Global.SHOW_ZEN_UPGRADE_NOTIFICATION, 0) != 0;
 
+        if (isWatch) {
+            Settings.Global.putInt(mContext.getContentResolver(),
+                    Global.SHOW_ZEN_UPGRADE_NOTIFICATION, 0);
+        }
+
         if (showNotification) {
             mNotificationManager.notify(TAG, SystemMessage.NOTE_ZEN_UPGRADE,
                     createZenUpgradeNotification());