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

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



Change-Id: I7b0d64fdda701f7ddd8a241b7054d8c5e94e0b53
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>