Switch ParcelFileDescriptor to OwnerFd

The inner type of ParcelFileDescriptor is switching
from std::fs::File to std::os::fd::OwnedFd.
Update all uses accordingly.

Bug: 242243245
Test: m
Change-Id: I10fce8d12f46f7dbbe12d399d7d5b970ccf313e0
diff --git a/virtualizationmanager/src/composite.rs b/virtualizationmanager/src/composite.rs
index fe17ff4..a4b7eae 100644
--- a/virtualizationmanager/src/composite.rs
+++ b/virtualizationmanager/src/composite.rs
@@ -93,7 +93,8 @@
                 .context("Invalid partition image file descriptor")?
                 .as_ref()
                 .try_clone()
-                .context("Failed to clone partition image file descriptor")?;
+                .context("Failed to clone partition image file descriptor")?
+                .into();
             let path = fd_path_for_file(&file);
             let size = get_partition_size(&file, &path)?;
             files.push(file);