Merge "Adding fastboot_driver interface + mock" am: 3ac1e55e am: ee0e75bb am: 80414cd2

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



Change-Id: Ia4c9d2d9557db6882c4c951e4117c2c3f7b2828a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>