Add traces around updateZenModeConfig

From field traces, it seems it often requires a lot of time (>190ms during LOCKSCREEN_TO_AOD CUJ) due to lock contention in the binder calls happening inside.

Adding a slice to make it more recognizable

Bug: 289485377
Test: Record Perfetto trace - check the new slice is visible
Change-Id: I77a662d17237246d8c9f2c06b38b5bfa64d5c69d

packages/SystemUI/src/com/android/systemui/statusbar/policy/ZenModeControllerImpl.java

@@ -28,6 +28,7 @@ import android.database.ContentObserver;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.HandlerExecutor;
+import android.os.Trace;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings.Global;
@@ -122,7 +123,12 @@ public class ZenModeControllerImpl implements ZenModeController, Dumpable {
                 userTracker.getUserId()) {
             @Override
             protected void handleValueChanged(int value, boolean observedChange) {
-                updateZenModeConfig();
+                try {
+                    Trace.beginSection("updateZenModeConfig");
+                    updateZenModeConfig();
+                } finally {
+                    Trace.endSection();
+                }
             }
         };
         mNoMan = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);