Move functions to settingslib for more code reuse

Bug: 110376110
Test: Tested on device
Change-Id: I2bbb8d01f675fc254e783b97b44d16f36846a416

src/com/android/settings/location/AppSettingsInjector.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.android.settings.location;
+
+import android.content.Context;
+import android.text.TextUtils;
+
+import androidx.preference.Preference;
+
+import com.android.settings.widget.AppPreference;
+import com.android.settings.widget.RestrictedAppPreference;
+import com.android.settingslib.location.InjectedSetting;
+import com.android.settingslib.location.SettingsInjector;
+
+import java.util.List;
+
+/**
+ * Adds the preferences specified by the {@link InjectedSetting} objects to a preference group.
+ */
+public class AppSettingsInjector extends SettingsInjector {
+
+    public AppSettingsInjector(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected Preference createPreference(Context prefContext, InjectedSetting setting) {
+        return TextUtils.isEmpty(setting.userRestriction)
+                ? new AppPreference(prefContext)
+                : new RestrictedAppPreference(prefContext, setting.userRestriction);
+    }
+}