Add timeout when re-enable PiP touch interaction

We disable and then enable touch interaction at the start and end of PiP
animation. When we try to re-enable it, we leave a time window in
between PiP animation finishes and WCT actually applies. This can end up
in some weird state if the user tries to interact with the PiP window
when they quickly resize / move the PiP window.

The timeout is introduced to prevent those interaction within that time
window.

Flag: N/A
Bug: 327640075
Test: manual
Change-Id: I8b4bc16e126caa2f0e381abf1979eaade3fbc1fd