Output switcher panel requires large title icon for Slice slider style

-Add "VIEW_TYPE_SLIDER_LARGE_ICON" to be a new panel type which would enlarge its title icon
-Set "VIEW_TYPE_SLIDER_LARGE_ICON" to MediaOutputPanel and MediaOutputGroupPanel
-Extend slider style and add customized icon size
-Add test cases

Bug: 157208551
Test: make -j42 RunSettingsRoboTests
Change-Id: I9b4de4aa552e8b26e766411f7eff93ea1a2d1910

src/com/android/settings/panel/MediaOutputPanel.java

@@ -246,7 +246,7 @@ public class MediaOutputPanel implements PanelContent, LocalMediaManager.DeviceC
 
     @Override
     public int getViewType() {
-        return PanelContent.VIEW_TYPE_SLIDER;
+        return PanelContent.VIEW_TYPE_SLIDER_LARGE_ICON;
     }
 
     private final MediaController.Callback mCb = new MediaController.Callback() {