manager: possible fix

- Possible fix a bug where IUserManager.getUsers(ZZZ) are not defined in the framework.jar
- Refactored WebUI X to meet the new WXInterface
- Only fetch the app from the current user and not all users

* manager: remove unused AIDL interfaces

Signed-off-by: Der_Googler <54764558+DerGoogler@users.noreply.github.com>

manager/app/src/main/aidl/com/sukisu/zako/IKsuInterface.aidl

@@ -1,8 +0,0 @@
-package com.sukisu.zako;
-
-import android.content.pm.PackageInfo;
-import rikka.parcelablelist.ParcelableListSlice;
-
-interface IKsuInterface {
-    ParcelableListSlice<PackageInfo> getPackages(int flags);
-}