Update keyboard quick switch view ordering and add icons

- Updated the keyboard quick switch view ordering to left-to-right (vice versa in RTL)
- Added app icons to keyboard quick switch taskviews

Flag: ENABLE_KEYBOARD_QUICK_SWITCH
Fixes: 275629107
Test: launched keyboard quick switch view and changed focus back and forth
Change-Id: Ie2f0a1c08c7065c53075f6fa015000a2d6184491

quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java

@@ -181,7 +181,7 @@ public final class KeyboardQuickSwitchController implements
             mModel.getThumbnailCache().updateThumbnailInBackground(task, callback);
         }
 
-        void updateTitleInBackground(Task task, Consumer<Task> callback) {
+        void updateIconInBackground(Task task, Consumer<Task> callback) {
             mModel.getIconCache().updateIconInBackground(task, callback);
         }