TV PIP: don't close menu after 10s if A11y enabled

DPAD navigation is not recognized as activity within the menu causing
the menu to close too early.

Bug: 393606618
Test: manual - enabled Talkback, open PiP menu and wait
Flag: EXEMPT bugfix

Change-Id: Iac9ff13cf5ea55cf569680e6ad3d9428f4215bb4