Merge "fastboot: get rid of manual transport memory management" into main am:...

Merge "fastboot: get rid of manual transport memory management" into main am: f667b6d8 am: dec9caf1

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2736776



Change-Id: If7d1634e0617f9c139dfa6f578d384e283133529
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>