Protect video recording callback from activity/module pauses

This CL should eliminate MediaRecorder start exceptions, which
appear to be due to ending the camera or switching the module.
Storage I/O could take a while during which pauses can occur,
so we check for them and avoid starting video in that case.

Bug: 16298718
Change-Id: I9abca815400e9ce545fed96f6e31cb792860a1d0
2 files changed