Add Private space Delete settings page inside PS settings page

Contains implementation of settings page for Delete private space
controller inside private space settings page.
- On selecting to delete private space displays list of account signed in
to private profile and deletes the private space after authentication.
- Shows a toast message after private space is deleted

- Adds dependency for setupdesgin loading layout to show a loading
  screen while deletion of private space is in progress.

Recording Link : b/318383729
go/ss/4Aq3rmbSGHMHesK.png

Bug: 318383729
Test: atest DeletePrivateSpaceControllerTest

Change-Id: Ia1730915e2469b47823c507f9ef6cd8f63c99baf

res/xml/private_space_settings.xml

@@ -65,7 +65,7 @@
         <Preference
             android:key="private_space_delete"
             android:title="@string/private_space_delete_title"
-            settings:controller="com.android.settings.privatespace.DeletePrivateSpaceController"
+            settings:controller="com.android.settings.privatespace.delete.DeletePrivateSpaceController"
             settings:searchable="false" />
 
     </PreferenceCategory>