Merge "Adding fastboot_driver interface + mock" am: 3ac1e55e1e

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2516535

Change-Id: I9781627d88c868868693b7fcf1881b13870a632a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>