Merge "fastboot: Fix flashing failure when a sparse image has an avb footer."...

Merge "fastboot: Fix flashing failure when a sparse image has an avb footer." into main am: ee4c9262 am: ee64b2df am: c4914fda

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2798383



Change-Id: If92fcc2777ef1635142252a2769e6df0b44b66b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>