Remove the use of from_raw_fd from fd_server/aidl.rs am: 105153e486

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3249591

Change-Id: I27aff7f4c736fc2a9b91826ca0945b7e62049c02
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>