Revert "Add waiting screen before PS setup completion"

This reverts commit 7b0b26ec92.

Reason for revert: b/331935387. ACA has already verified the revert.

Change-Id: Idf28854f25c4bad3563408dbb7b5c84f0cdbe2f2

src/com/android/settings/privatespace/SetupSuccessFragment.java

@@ -86,6 +86,8 @@ public class SetupSuccessFragment extends InstrumentedFragment {
             if (activity != null) {
                 mMetricsFeatureProvider.action(
                         getContext(), SettingsEnums.ACTION_PRIVATE_SPACE_SETUP_DONE);
+                //TODO(b/307729746): Add a test to verify PS is locked after setup completion.
+                PrivateSpaceMaintainer.getInstance(activity).lockPrivateSpace();
                 Intent allAppsIntent = new Intent(Intent.ACTION_ALL_APPS);
                 ResolveInfo resolveInfo =
                         activity.getPackageManager()