Cherish: Add force background freezer

Change-Id: Ic0c119282c295db9b7d4dc03c037828b02c5a9e4

Signed-off-by: Hưng Phan <phandinhhungvp2001@gmail.com>

src/com/cherish/settings/preferences/ForceBackgroundFreezePreferenceController.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 Project Kaleidoscope
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.cherish.settings.preferences;
+
+import android.app.ActivityManager;
+import android.content.Context;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.R;
+
+public class ForceBackgroundFreezePreferenceController extends BasePreferenceController {
+    private static final String TAG = "ForceBackgroundFreezePreferenceController";
+
+    public ForceBackgroundFreezePreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    @AvailabilityStatus
+    public int getAvailabilityStatus() {
+        int ret = UNSUPPORTED_ON_DEVICE;
+
+        try {
+            if (ActivityManager.getService().isAppFreezerEnabled())
+                ret = AVAILABLE;
+        } catch (RemoteException e) {
+            Log.w(TAG, "Unable to obtain freezer enabling status from ActivityManager");
+        }
+
+        return ret;
+    }
+}