Consolidate all wrappers used for testing.

- Add the wrapper package and move all wrappers to the wrapper package.
- Get rid of some wrapper interface/impl implementation and have a
wrapper class directly.

Bug: 65634579
Test: make RunSettingsRoboTests
Change-Id: Ic757d8f7bacfa7a034c7e692205bc1dc4b0e1de1

src/com/android/settings/applications/NotificationApps.java

@@ -21,6 +21,7 @@ import android.content.pm.ApplicationInfo;
 import com.android.settings.R;
 import com.android.settings.dashboard.SummaryLoader;
 import com.android.settings.notification.NotificationBackend;
+import com.android.settingslib.wrapper.PackageManagerWrapper;
 
 /**
  * Extension of ManageApplications with no changes other than having its own
@@ -39,7 +40,7 @@ public class NotificationApps extends ManageApplications {
             mContext = context;
             mLoader = loader;
             mNotificationBackend = new NotificationBackend();
-            mPackageManager = new PackageManagerWrapperImpl(mContext.getPackageManager());
+            mPackageManager = new PackageManagerWrapper(mContext.getPackageManager());
         }
 
         @Override