Revert "Revert "certify_bootimg: support --extra_footer_args""

This reverts commit dc7cea59b3bdf95435e4846309474b28a7fad161.

After more discussions, decides to use the approach of
--extra_footer_args, because `avbtool info_image` doesn't
output a avb property value if the length is >= 256. So
we cannot retain the avb properties based on the output of
avbtool.

Bug: 232062499
Test: atest --host certify_bootimg_test
Change-Id: Id9acb4c8d1238a30451784970443f6112508a6ec
2 files changed