Merge "[mtectrl] properly handle FD for -t" am: 56f1b53b09

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2279947

Change-Id: Ibbf0b4fd52726ce8404c17072c34709459b0aa57
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>