Update Location Settings footer when MLS changes

Also changed strings:
- from "Manage location permissions" to "App location permissions"
- from "Location Services" to "manage location services"

Bug: 180533061
Test: on device
Change-Id: I135430674b9363ea7caaa44f6e9baed96b6ec3cf

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 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.Html;
+
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settingslib.widget.FooterPreference;
+
+/**
+ * Preference controller for Location Settings footer.
+ */
+public class LocationSettingsFooterPreferenceController extends LocationBasePreferenceController {
+    FooterPreference mFooterPreference;
+
+    public LocationSettingsFooterPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mFooterPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void onLocationModeChanged(int mode, boolean restricted) {
+        boolean enabled = mLocationEnabler.isEnabled(mode);
+        mFooterPreference.setTitle(Html.fromHtml(mContext.getString(
+                enabled ? R.string.location_settings_footer_location_on
+                        : R.string.location_settings_footer_location_off)));
+    }
+}