Pass externally synchronizaed flag to vulkan memory allocator.

Change-Id: Iea561e5105ff46eda8fafe89b068bca6e7d1a523
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289621
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
1 file changed