Sound + Output Switcher on Sound Setting

1. Show "play media to" item when Previously Connected device is available
2. Click "Play media to" to launch output slice
3. Update test case

Bug: 126475101
Test: make -j50 RunSettingsRoboTests
Change-Id: Id8afd1a2407acb78c11e81d2420ae8c16130a321

src/com/android/settings/sound/HandsFreeProfileOutputPreferenceController.java

@@ -20,7 +20,9 @@ import static android.bluetooth.IBluetoothHearingAid.HI_SYNC_ID_INVALID;
 
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
+import android.text.TextUtils;
 
+import androidx.preference.ListPreference;
 import androidx.preference.Preference;
 
 import com.android.settings.R;
@@ -32,13 +34,55 @@ import com.android.settingslib.bluetooth.HearingAidProfile;
  * This class allows switching between HFP-connected & HAP-connected BT devices
  * while in on-call state.
  */
-public class HandsFreeProfileOutputPreferenceController extends
-        AudioSwitchPreferenceController {
+public class HandsFreeProfileOutputPreferenceController extends AudioSwitchPreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private static final int INVALID_INDEX = -1;
 
     public HandsFreeProfileOutputPreferenceController(Context context, String key) {
         super(context, key);
     }
 
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final String address = (String) newValue;
+        if (!(preference instanceof ListPreference)) {
+            return false;
+        }
+
+        final CharSequence defaultSummary = mContext.getText(R.string.media_output_default_summary);
+        final ListPreference listPreference = (ListPreference) preference;
+        if (TextUtils.equals(address, defaultSummary)) {
+            // Switch to default device which address is device name
+            mSelectedIndex = getDefaultDeviceIndex();
+            setActiveBluetoothDevice(null);
+            listPreference.setSummary(defaultSummary);
+        } else {
+            // Switch to BT device which address is hardware address
+            final int connectedDeviceIndex = getConnectedDeviceIndex(address);
+            if (connectedDeviceIndex == INVALID_INDEX) {
+                return false;
+            }
+            final BluetoothDevice btDevice = mConnectedDevices.get(connectedDeviceIndex);
+            mSelectedIndex = connectedDeviceIndex;
+            setActiveBluetoothDevice(btDevice);
+            listPreference.setSummary(btDevice.getAliasName());
+        }
+        return true;
+    }
+
+    private int getConnectedDeviceIndex(String hardwareAddress) {
+        if (mConnectedDevices != null) {
+            for (int i = 0, size = mConnectedDevices.size(); i < size; i++) {
+                final BluetoothDevice btDevice = mConnectedDevices.get(i);
+                if (TextUtils.equals(btDevice.getAddress(), hardwareAddress)) {
+                    return i;
+                }
+            }
+        }
+        return INVALID_INDEX;
+    }
+
     @Override
     public void updateState(Preference preference) {
         if (preference == null) {
@@ -83,7 +127,41 @@ public class HandsFreeProfileOutputPreferenceController extends
         setPreference(mediaOutputs, mediaValues, preference);
     }
 
-    @Override
+    int getDefaultDeviceIndex() {
+        // Default device is after all connected devices.
+        return mConnectedDevices.size();
+    }
+
+    void setupPreferenceEntries(CharSequence[] mediaOutputs, CharSequence[] mediaValues,
+            BluetoothDevice activeDevice) {
+        // default to current device
+        mSelectedIndex = getDefaultDeviceIndex();
+        // default device is after all connected devices.
+        final CharSequence defaultSummary = mContext.getText(R.string.media_output_default_summary);
+        mediaOutputs[mSelectedIndex] = defaultSummary;
+        // use default device name as address
+        mediaValues[mSelectedIndex] = defaultSummary;
+        for (int i = 0, size = mConnectedDevices.size(); i < size; i++) {
+            final BluetoothDevice btDevice = mConnectedDevices.get(i);
+            mediaOutputs[i] = btDevice.getAliasName();
+            mediaValues[i] = btDevice.getAddress();
+            if (btDevice.equals(activeDevice)) {
+                // select the active connected device.
+                mSelectedIndex = i;
+            }
+        }
+    }
+
+    void setPreference(CharSequence[] mediaOutputs, CharSequence[] mediaValues,
+            Preference preference) {
+        final ListPreference listPreference = (ListPreference) preference;
+        listPreference.setEntries(mediaOutputs);
+        listPreference.setEntryValues(mediaValues);
+        listPreference.setValueIndex(mSelectedIndex);
+        listPreference.setSummary(mediaOutputs[mSelectedIndex]);
+        mAudioSwitchPreferenceCallback.onPreferenceDataChanged(listPreference);
+    }
+
     public void setActiveBluetoothDevice(BluetoothDevice device) {
         if (!Utils.isAudioModeOngoingCall(mContext)) {
             return;