Disable entry point of output switcher

It adds a minimum value if it shows only one available
cast device in the output switcher. Because users can only
change the volume slider or stop control in the output switcher.
It's too hidden to have the user stop cast in the UI.

- This CL will disable the entry point of the output switcher
  if there is only one available cast device in the list.
- Update test cases.

Bug: 163095048
Test: make -j42 RunSettingsRoboTests
Change-Id: I8906878e1ba769d6940041f17d83b5de6b2a32c0

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

@@ -17,6 +17,7 @@
 package com.android.settings.media;
 
 import static android.app.slice.Slice.EXTRA_RANGE_VALUE;
+import static android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
 
 import static com.android.settings.slices.CustomSliceRegistry.REMOTE_MEDIA_SLICE_URI;
 
@@ -24,11 +25,15 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
+import android.media.MediaRouter2Manager;
 import android.media.RoutingSessionInfo;
 import android.net.Uri;
+import android.text.SpannableString;
 import android.text.TextUtils;
+import android.text.style.ForegroundColorSpan;
 import android.util.Log;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.core.graphics.drawable.IconCompat;
 import androidx.slice.Slice;
 import androidx.slice.builders.ListBuilder;
@@ -59,6 +64,9 @@ public class RemoteMediaSlice implements CustomSliceable {
 
     private MediaDeviceUpdateWorker mWorker;
 
+    @VisibleForTesting
+    MediaRouter2Manager mRouterManager;
+
     public RemoteMediaSlice(Context context) {
         mContext = context;
     }
@@ -80,6 +88,9 @@ public class RemoteMediaSlice implements CustomSliceable {
             Log.e(TAG, "Unable to get the slice worker.");
             return listBuilder.build();
         }
+        if (mRouterManager == null) {
+            mRouterManager = MediaRouter2Manager.getInstance(mContext);
+        }
         // Only displaying remote devices
         final List<RoutingSessionInfo> infos = getWorker().getActiveRemoteMediaDevice();
         if (infos.isEmpty()) {
@@ -98,8 +109,10 @@ public class RemoteMediaSlice implements CustomSliceable {
                         + maxVolume);
                 continue;
             }
+            final CharSequence appName = Utils.getApplicationLabel(
+                    mContext, info.getClientPackageName());
             final CharSequence outputTitle = mContext.getString(R.string.media_output_label_title,
-                    Utils.getApplicationLabel(mContext, info.getClientPackageName()));
+                    appName);
             listBuilder.addInputRange(new InputRangeBuilder()
                     .setTitleItem(icon, ListBuilder.ICON_IMAGE)
                     .setTitle(castVolume)
@@ -107,11 +120,21 @@ public class RemoteMediaSlice implements CustomSliceable {
                     .setPrimaryAction(getSoundSettingAction(castVolume, icon, info.getId()))
                     .setMax(maxVolume)
                     .setValue(info.getVolume()));
+
+            final boolean isMediaOutputDisabled =
+                    Utils.isMediaOutputDisabled(mRouterManager, info.getClientPackageName());
+            final SpannableString spannableTitle = new SpannableString(
+                    TextUtils.isEmpty(appName) ? "" : appName);
+            spannableTitle.setSpan(new ForegroundColorSpan(
+                            Utils.getColorAttrDefaultColor(
+                                    mContext, android.R.attr.textColorSecondary)), 0,
+                    spannableTitle.length(), SPAN_EXCLUSIVE_EXCLUSIVE);
             listBuilder.addRow(new ListBuilder.RowBuilder()
-                    .setTitle(outputTitle)
+                    .setTitle(isMediaOutputDisabled ? spannableTitle : outputTitle)
                     .setSubtitle(info.getName())
                     .setTitleItem(emptyIcon, ListBuilder.ICON_IMAGE)
-                    .setPrimaryAction(getMediaOutputSliceAction(info.getClientPackageName())));
+                    .setPrimaryAction(getMediaOutputSliceAction(
+                            info.getClientPackageName(), isMediaOutputDisabled)));
         }
         return listBuilder.build();
     }
@@ -144,9 +167,12 @@ public class RemoteMediaSlice implements CustomSliceable {
         return primarySliceAction;
     }
 
-    private SliceAction getMediaOutputSliceAction(String packageName) {
+    private SliceAction getMediaOutputSliceAction(
+            String packageName, boolean isMediaOutputDisabled) {
         final Intent intent = new Intent()
-                .setAction(MediaOutputSliceConstants.ACTION_MEDIA_OUTPUT)
+                .setAction(isMediaOutputDisabled
+                        ? ""
+                        : MediaOutputSliceConstants.ACTION_MEDIA_OUTPUT)
                 .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                 .putExtra(MediaOutputSliceConstants.EXTRA_PACKAGE_NAME, packageName);
         final IconCompat icon = IconCompat.createWithResource(mContext,