Merge "remount: Split fstab and checkpointing code into helper functions." am:...

Merge "remount: Split fstab and checkpointing code into helper functions." am: 18d8cd76 am: 4d9d7034 am: f7c4eb79

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2173542



Change-Id: I9e3da3fe62b5ed2a7c51632bbe9598fda2361ddd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>