Use BBQ syncing instead of blocking in VRI

BBQ can handle syncing, where it will prevent out of order frames and
ensure multiple syncs can be handled. Therefore, remove the code in VRI
where it blocks for blast sync and instead let BBQ handle it.

Test: Split, Pip
Bug: 200285149
Change-Id: Ia0e403cb36aa3e34b5dd02eef965a3261ba6536a