Close the KQS view when touching the gesture nav region

Also, stop handling KQS open/close during gestures

Flag: LEGACY ENABLE_KEYBOARD_QUICK_SWITCH ENABLED
Fixes: 328689890
Fixes: 328689534
Fixes: 328692760
Test: attempted gestures while KQS is shown. attempted KQS while attempting gestures
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:14d912b062e69fe8bc4729b6f8b40e53d5b4a669)
Merged-In: Idbd1f9cef09d9fbf611350d0847d94ccf8300369
Change-Id: Idbd1f9cef09d9fbf611350d0847d94ccf8300369