Remove click listeners from app op icons

Instead, the click listener is set on the app opp container since
clicking on the app opp container results in the same action as clickng on the
individual app icons. As per a11y guidance, only set the click listener
on the container.

Test: manual
Fixes: 153281363
Change-Id: Ic1c2bdb2f77fc459a3a3e997ed494b4bab36a273