Merge "snapuserd: Split Tempdevice into a separate file." into main am:...

Merge "snapuserd: Split Tempdevice into a separate file." into main am: 1d8e349c am: 76f3af72 am: d7dc8d64 am: fb897bbf

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2640541



Change-Id: I3934120cac7fe70b49d007d9edbcbeb086f9f439
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>