Introduce BluetoothInbandRingingPreferenceCtrl

- Create new BluetoothInbandRingingPreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I2551803b50323c93ce8f1595d5bbab92b7a18ed4

src/com/android/settings/development/BluetoothInbandRingingPreferenceController.java

@@ -0,0 +1,91 @@
+/*
+ * 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.development;
+
+import android.bluetooth.BluetoothHeadset;
+import android.content.Context;
+import android.os.SystemProperties;
+import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+public class BluetoothInbandRingingPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
+
+    private static final String BLUETOOTH_ENABLE_INBAND_RINGING_KEY =
+            "bluetooth_enable_inband_ringing";
+    @VisibleForTesting
+    static final String BLUETOOTH_ENABLE_INBAND_RINGING_PROPERTY =
+            "persist.bluetooth.enableinbandringing";
+
+    private SwitchPreference mPreference;
+
+    public BluetoothInbandRingingPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return isInbandRingingSupported();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return BLUETOOTH_ENABLE_INBAND_RINGING_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        SystemProperties.set(BLUETOOTH_ENABLE_INBAND_RINGING_PROPERTY,
+                isEnabled ? "true" : "false");
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final boolean isEnabled = SystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_INBAND_RINGING_PROPERTY, true /* default */);
+        mPreference.setChecked(isEnabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        mPreference.setEnabled(false);
+        // the default setting for this preference is the enabled state
+        mPreference.setChecked(true);
+        SystemProperties.set(BLUETOOTH_ENABLE_INBAND_RINGING_PROPERTY, "true");
+    }
+
+    @VisibleForTesting
+    boolean isInbandRingingSupported() {
+        return BluetoothHeadset.isInbandRingingSupported(mContext);
+    }
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -270,7 +270,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         // select usb configuration
         controllers.add(new BluetoothDeviceNoNamePreferenceController(context));
         controllers.add(new BluetoothAbsoluteVolumePreferenceController(context));
-        // enable in-band ringing
+        controllers.add(new BluetoothInbandRingingPreferenceController(context));
         // bluetooth avrcp version
         // bluetooth audio codec
         // bluetooth audio sample rate