Improve MessageQueue tests for error handling am: ec445d7fac

Original change: https://android-review.googlesource.com/c/platform/system/libfmq/+/3269996

Change-Id: I17236d37e2bbdcafd3329db54ff7b961c8bc98da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>