Clean up split system user code in packages/apps/Settings/

Remove legacy code belonged to Andrometa project. Split system user
feature is always turned off now.

Bug: 137101239
Test: build, sync and reboot
Change-Id: Ieb84a6e131383dcd263a5d9b29a49dc64d905fe0

src/com/android/settings/wifi/WifiConfigController.java

@@ -34,7 +34,6 @@ import android.net.wifi.WifiEnterpriseConfig.Phase2;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.IBinder;
-import android.os.UserManager;
 import android.security.Credentials;
 import android.security.KeyStore;
 import android.telephony.SubscriptionInfo;
@@ -443,10 +442,7 @@ public class WifiConfigController implements TextWatcher,
 
             mSsidScanButton.setVisibility(View.GONE);
         }
-
-        if (!isSplitSystemUser()) {
-            mSharedCheckBox.setVisibility(View.GONE);
-        }
+        mSharedCheckBox.setVisibility(View.GONE);
 
         mConfigUi.setCancelButton(res.getString(R.string.wifi_cancel));
         if (mConfigUi.getSubmitButton() != null) {
@@ -459,13 +455,6 @@ public class WifiConfigController implements TextWatcher,
         }
     }
 
-    @VisibleForTesting
-    boolean isSplitSystemUser() {
-        final UserManager userManager =
-                (UserManager) mContext.getSystemService(Context.USER_SERVICE);
-        return userManager.isSplitSystemUser();
-    }
-
     private void addRow(ViewGroup group, int name, String value) {
         View row = mConfigUi.getLayoutInflater().inflate(R.layout.wifi_dialog_row, group, false);
         ((TextView) row.findViewById(R.id.name)).setText(name);