Change PostTask in base::debug::TaskAnnotator::RunTask() and  base::debug::TaskAnnotator::DidQueueTask() to use Flow v2.
Change PostTask in base::debug::TaskAnnotator::RunTask() and  base::debug::TaskAnnotator::DidQueueTask() to use Flow v2.

BUG=https://github.com/catapult-project/catapult/issues/1079

Review URL: https://codereview.chromium.org/1275693002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#342403}

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