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 am: 687c0fc7

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



Change-Id: Ib9d435cb8ef7ae37c184a7a7f26d717fb4bb0dbe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>