Clear Accessibility Focus from icon after Shorcut Menu invoked

Similar to I2726504094af2abacf1c41089c7bcd4efb588099

Fixes: 267695526
Test: have talkback on
      open all apps
      open long press menu
      ensure focus stays on pop up menu
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:cb582591b3861603eebd2e26ad94db1a49ff9a24)
Merged-In: I38f78df3855495c53a5ae8966e9a996e4679e95b
Change-Id: I38f78df3855495c53a5ae8966e9a996e4679e95b