Merge "Decouple FUSE mount from main thread for demo user" into rvc-dev am: 931d7d2703

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12261202

Change-Id: I90b8ffbf76d92bebf9404f8f4f41a93f4f6c5d3d