Tweaking PiP for accessibility.

- Disabling timeout when the PiP menu is invoked via an accessibility event
- Increasing default duration before menu times out and collapses
- Fixing issue where temporary bundle data was being clobbered

Bug: 36103023
Test: Launch PiP activity with accessibility, ensure menu does not time out
Change-Id: I4beda18ef2fb2e2b638b0ff6bac9a71ed1986639