Fix some blast sync issues in VRI

1. If a relayout requested blast sync but we canceled the draw and
schedule it for later, the next draw won't use blast sync. This change
makes sure we use blast sync on the next performTraversal

2. Remove mReportDrawToWm and always send transaction to WMS to apply.
This is because there could be multiple report draws in a row and we'd
unset the flag after the first and not send the other transactions to
WMS

Test: Screen rotation no flicker with rounded corners
Change-Id: I8bf3881dfcdd2e54f0ec78f9fb695c76385f4228