Move vulkan memory uma stats to report on submit.

The current model is biased towards users who make lots of allocations
so the overall histogram gets more samples for high allocation/memory
use. By switching this to reporting at submit time, it should make
the reports much more even across all users.

Change-Id: I269df9ea5e54439f0cca5e7637b0f39d1eaf903a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/336957
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
5 files changed