Added check to copy AVB footer

is_logical shouldn't work in bootloader for some devices, so we also need to check
using should_flash_in_userspace to see if partition is dynamic

Test: tested to flash {partition} on raven and checked to see avb
footers are not copied from dynamic partitions

Change-Id: Iabb3ea535fa80b26cf1c08040beb3d4ea5e8c2ae