Change transfer list format to include block hashes

Add source and target block hashes as parameters to transfer list
commands that copy or patch data to a partition. This allows the
updater to verify the status of each command in the transfer list
and makes resuming block based OTAs possible. Due to the changes,
update the transfer list version to 3.

Needs matching changes from
  I1e752464134aeb2d396946348e6041acabe13942

Bug: 18262110
Change-Id: Ia5c56379f570047f10f0aa7373a1025439495c98