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

Change-Id: I38f78df3855495c53a5ae8966e9a996e4679e95b