Fix the issue talkback feedback doesn't say anything when user long

press on an app icon.

When user long press on an app icon, the a11y focus event wasn't
properly triggered on the container of deep shortcut, which is why
there wasn't any talkback feedback after long press on an app icon.

Bug: 140786694
Change-Id: Ib38db147faa5a163985f1ed74beec04c588b022c