Update KQS task view layouts to new specs

The small size of the screenshots and make text look odd. Implementing new UI specs to improve this.

- Updated icon position and size
- Added some blur to the thumbnail

Flag: LEGACY ENABLE_KEYBOARD_QUICK_SWITCH ENABLED
Fixes: 328259439
Fixes: 328692456
Test: opened KQS in dark and light mode
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:dba7cbae1adfde615060598a55b5ee0edfedef9f)
Merged-In: I2b20100ddeb562291edf5f0bacbce916002eee45
Change-Id: I2b20100ddeb562291edf5f0bacbce916002eee45