Fix 4 broken work profile tests

Commit 2953f31b61 skipped
RunSettingsRoboTests. The tests started failing because
WorkSoundPreferenceController calls UserManager.isUserUnlocked(int) now
which is not implemented in robolectric.

Fixed by adding a wrapper method to AudioHelper.

Fix: 34819603
Test: make RunSettingsRoboTests
Change-Id: Ia79cc4def9442706752f7e7b9a895ffa8150fd9d

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

@@ -42,6 +42,10 @@ public class AudioHelper {
         return Utils.getManagedProfileId(um, UserHandle.myUserId());
     }
 
+    public boolean isUserUnlocked(UserManager um, @UserIdInt int userId) {
+        return um.isUserUnlocked(userId);
+    }
+
     public Context createPackageContextAsUser(@UserIdInt int profileId) {
         return Utils.createPackageContextAsUser(mContext, profileId);
     }