tree ed0c2cf00d663e01b1ca013e01f66a8dc094a99a
parent cf4600e1582f3001a26b4430a5ffbfe23b3ff4d1
author Kelvin Zhang <zhangkelvin@google.com> 1609169328 -0500
committer Kelvin Zhang <zhangkelvin@google.com> 1609804440 -0500

Move signature persistence to CheckpointUpdateProgress

After update_engine extracts the signature, it immediately saves it to
disk. However, if the signature is saved but subsequent update
checkpoint isn't saved for some reason, resume will fail. Therefore we
move the signature saving logic to CheckpointUpdateProgress()

Test: treehugger
Bug: 176087961
Change-Id: Iccb6854eaf07c7b81272376e685df43015ea46e2