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