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/FallbackHome.java

@@ -31,7 +31,6 @@ import android.os.Handler;
 import android.os.Message;
 import android.os.PowerManager;
 import android.os.SystemClock;
-import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.util.Log;
@@ -166,12 +165,6 @@ public class FallbackHome extends Activity {
                     .addCategory(Intent.CATEGORY_HOME);
             final ResolveInfo homeInfo = getPackageManager().resolveActivity(homeIntent, 0);
             if (Objects.equals(getPackageName(), homeInfo.activityInfo.packageName)) {
-                if (UserManager.isSplitSystemUser()
-                        && UserHandle.myUserId() == UserHandle.USER_SYSTEM) {
-                    // This avoids the situation where the system user has no home activity after
-                    // SUW and this activity continues to throw out warnings. See b/28870689.
-                    return;
-                }
                 Log.d(TAG, "User unlocked but no home; let's hope someone enables one soon?");
                 mHandler.sendEmptyMessageDelayed(0, 500);
             } else {

src/com/android/settings/applications/appinfo/AppButtonsPreferenceController.java

@@ -613,8 +613,7 @@ public class AppButtonsPreferenceController extends BasePreferenceController imp
     /** Returns whether there is only one user on this device, not including the system-only user */
     private boolean isSingleUser() {
         final int userCount = mUserManager.getUserCount();
-        return userCount == 1
+        return userCount == 1;
-                || (mUserManager.isSplitSystemUser() && userCount == 2);
     }
 
     private final BroadcastReceiver mCheckKillProcessesReceiver = new BroadcastReceiver() {

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);
-        }
 
         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);

src/com/android/settings/wifi/WifiConfigController2.java

@@ -32,7 +32,6 @@ import android.net.wifi.WifiEnterpriseConfig.Eap;
 import android.net.wifi.WifiEnterpriseConfig.Phase2;
 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;
@@ -408,10 +407,7 @@ public class WifiConfigController2 implements TextWatcher,
 
             mSsidScanButton.setVisibility(View.GONE);
         }
-
-        if (!isSplitSystemUser()) {
         mSharedCheckBox.setVisibility(View.GONE);
-        }
 
         mConfigUi.setCancelButton(res.getString(R.string.wifi_cancel));
         if (mConfigUi.getSubmitButton() != null) {
@@ -422,13 +418,6 @@ public class WifiConfigController2 implements TextWatcher,
         mView.findViewById(R.id.l_wifidialog).requestFocus();
     }
 
-    @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);

tests/robotests/src/com/android/settings/wifi/WifiConfigController2Test.java

@@ -430,11 +430,6 @@ public class WifiConfigController2Test {
             super(parent, view, wifiEntry, mode, wifiManager);
         }
 
-        @Override
-        boolean isSplitSystemUser() {
-            return false;
-        }
-
         @Override
         KeyStore getKeyStore() {
             return mKeyStore;

tests/robotests/src/com/android/settings/wifi/WifiConfigControllerTest.java

@@ -411,11 +411,6 @@ public class WifiConfigControllerTest {
             super(parent, view, accessPoint, mode, wifiManager);
         }
 
-        @Override
-        boolean isSplitSystemUser() {
-            return false;
-        }
-
         @Override
         KeyStore getKeyStore() { return mKeyStore; }
     }