Merge "snapuserd: Refactor daemon/server." am: 8425f6e6e6 am: de005e145f am: 975d3eb45f am: eeba09c35b

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1468410

Change-Id: I345189e056f8bb93a4b1be05348e4ffc3c9b9125