Keyboard quick switch polish

- Added support for escape(backtick on some keyboards) keyboard keys
- Added support for d-pad left and right keyboard keys
- Fixed janky behaviour when quick switching too quickly.
- Removed unused code

Bug: 269618928
Test: Tried quick switch very quickly, tried escape, d-pad left and right keys in RTL and LTR modes
Change-Id: Ie03207cb349891e9c2de18502f3f65b7c8f9c018