Update pip menu to use a11y api for ui timeout value.

Remove never timeout in pip menu when a11y enabled. Using
api introduced by A11yManager to get recommended ui timeout
value instead.

Bug: 119893870
Test: Launch PiP activity, ensure menu timeout respect to
Settings->A11y->Time to take action.

Change-Id: I10f765acf3c70cfcec476ac3056f8663598721d9