Merge "Close stdios when fork/exec'ing virtmgr" into main am: fdd33a8a17

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3227222

Change-Id: I78e25a4eb428f862a5670809ab93a17f47f3df19
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>