Merge "Updating fastboot to modern c++ standards" am: 14000f19 am: 833ca659 am: 61547165

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2320806



Change-Id: Ib41c97d216909b7b1ddbb0c026d2339815c81646
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>