Refactor Work sounds in SoundSettings.

- final round of refactoring SoundSettings to use preference
  controller.
- add work sound controller to control all the work profile sound
  settings.

Change-Id: Ifa9f9c1f717ca292576f077311fe284325e12651
Fixes: 32276590
Test: make RunSettingsRoboTests

src/com/android/settings/notification/AudioHelper.java

@@ -16,8 +16,12 @@
 
 package com.android.settings.notification;
 
+import android.annotation.UserIdInt;
 import android.content.Context;
 import android.media.AudioSystem;
+import android.os.UserHandle;
+import android.os.UserManager;
+import com.android.settings.Utils;
 
 /**
  * Helper class to wrap API for testing
@@ -34,4 +38,11 @@ public class AudioHelper {
         return AudioSystem.isSingleVolume(mContext);
     }
 
+    public int getManagedProfileId(UserManager um) {
+        return Utils.getManagedProfileId(um, UserHandle.myUserId());
+    }
+
+    public Context createPackageContextAsUser(@UserIdInt int profileId) {
+        return Utils.createPackageContextAsUser(mContext, profileId);
+    }
 }