Update output switch UI

This CL include following update:

1. Add onDeviceAttributesChanged() callback to update UI
   when device attributes are changed.
2. Fix the top device when user press device to transfer.
3. Update UI when device is on goning call state and receive
   STREAM_DEVICES_CHANGED_ACTION intent.

Bug: 144535188
Test: make -j42 RunSettingsRoboTests
Change-Id: Idd5fb95054db30f8184faf4f6ab75d0b550907a1

src/com/android/settings/media/MediaDeviceUpdateWorker.java

@@ -31,6 +31,7 @@ import android.text.TextUtils;
 import androidx.annotation.VisibleForTesting;
 
 import com.android.settings.slices.SliceBackgroundWorker;
+import com.android.settingslib.Utils;
 import com.android.settingslib.media.LocalMediaManager;
 import com.android.settingslib.media.MediaDevice;
 import com.android.settingslib.utils.ThreadUtils;
@@ -49,6 +50,9 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
     private final DevicesChangedBroadcastReceiver mReceiver;
     private final String mPackageName;
 
+    private boolean mIsTouched;
+    private MediaDevice mTopDevice;
+
     @VisibleForTesting
     LocalMediaManager mLocalMediaManager;
 
@@ -62,6 +66,7 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
     @Override
     protected void onSlicePinned() {
         mMediaDevices.clear();
+        mIsTouched = false;
         if (mLocalMediaManager == null) {
             mLocalMediaManager = new LocalMediaManager(mContext, mPackageName, null);
         }
@@ -100,6 +105,11 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
         notifySliceChange();
     }
 
+    @Override
+    public void onDeviceAttributesChanged() {
+        notifySliceChange();
+    }
+
     public List<MediaDevice> getMediaDevices() {
         return new ArrayList<>(mMediaDevices);
     }
@@ -118,11 +128,28 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
         return mLocalMediaManager.getCurrentConnectedDevice();
     }
 
+    void setIsTouched(boolean isTouched) {
+        mIsTouched = isTouched;
+    }
+
+    boolean getIsTouched() {
+        return mIsTouched;
+    }
+
+    void setTopDevice(MediaDevice device) {
+        mTopDevice = device;
+    }
+
+    MediaDevice getTopDevice() {
+        return mTopDevice;
+    }
+
     private class DevicesChangedBroadcastReceiver extends BroadcastReceiver {
         @Override
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
-            if (TextUtils.equals(AudioManager.STREAM_DEVICES_CHANGED_ACTION, action)) {
+            if (TextUtils.equals(AudioManager.STREAM_DEVICES_CHANGED_ACTION, action)
+                    && Utils.isAudioModeOngoingCall(mContext)) {
                 notifySliceChange();
             }
         }

src/com/android/settings/media/MediaOutputSlice.java

@@ -61,7 +61,7 @@ public class MediaOutputSlice implements CustomSliceable {
     }
 
     @VisibleForTesting
-    void init(String packageName, MediaDeviceUpdateWorker worker) {
+    void init(MediaDeviceUpdateWorker worker) {
         mWorker = worker;
     }
 
@@ -79,15 +79,20 @@ public class MediaOutputSlice implements CustomSliceable {
         }
 
         final List<MediaDevice> devices = getMediaDevices();
+        final MediaDeviceUpdateWorker worker = getWorker();
+        final MediaDevice connectedDevice = worker.getCurrentConnectedMediaDevice();
+        final boolean isTouched = worker.getIsTouched();
+        // Fix the last top device when user press device to transfer.
+        final MediaDevice topDevice = isTouched ? worker.getTopDevice() : connectedDevice;
 
-        final MediaDevice connectedDevice = getWorker().getCurrentConnectedMediaDevice();
-        if (connectedDevice != null) {
-            listBuilder.addRow(getActiveDeviceHeaderRow(connectedDevice));
+        if (topDevice != null) {
+            listBuilder.addRow(getActiveDeviceHeaderRow(topDevice));
+            worker.setTopDevice(topDevice);
         }
 
         for (MediaDevice device : devices) {
-            if (connectedDevice == null
-                    || !TextUtils.equals(connectedDevice.getId(), device.getId())) {
+            if (topDevice == null
+                    || !TextUtils.equals(topDevice.getId(), device.getId())) {
                 listBuilder.addRow(getMediaDeviceRow(device));
             }
         }
@@ -173,6 +178,7 @@ public class MediaOutputSlice implements CustomSliceable {
         final MediaDevice device = worker.getMediaDeviceById(id);
         if (device != null) {
             Log.d(TAG, "onNotifyChange() device name : " + device.getName());
+            worker.setIsTouched(true);
             worker.connectDevice(device);
         }
     }