Convert location settings to DashboardFragment.

- change LocationMode, LocationSettings, and ScanningSettings to be
DashboardFragment.
- remove LocationSettingsBase and moved base logics into base
controller.
- add controllers for the preferences under the 3 location settings
pages.

Fixes: 68719207
Test: make RunSettingsRoboTests
Change-Id: Icedf691c2a9f7989faebee39ea9da672209b7957

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2017 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.os.UserManager;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+/**
+ * A base controller for preferences that listens to location settings change and modifies location
+ * settings.
+ */
+public abstract class LocationBasePreferenceController extends AbstractPreferenceController
+        implements PreferenceControllerMixin, LocationEnabler.LocationModeChangeListener {
+
+    protected final UserManager mUserManager;
+    protected final LocationEnabler mLocationEnabler;
+
+    public LocationBasePreferenceController(Context context, Lifecycle lifecycle) {
+        super(context);
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mLocationEnabler = new LocationEnabler(context, this /* listener */, lifecycle);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+}