tree e249ffbc796df7f2a2681fdc2fbff149a3b565ff
parent decda14f024576acba0035cce76f8da3d660d275
author Daniel Rosenberg <drosen@google.com> 1551764791 -0800
committer Daniel Rosenberg <drosen@google.com> 1551938709 -0800

Switch Checkpoint Restore code to c style File ops

In preparation for restore code, we need to guarantee fsync happens.
Switch over to fd based operations to prepare for that.

Test: Successfully restores device over reboots
Change-Id: Ic9901779e8a4258bf8090d6a62fa9829e343fd39