Make nsjail quiet
Make nsjail quiet

Only print important messages instead of the default
fairly verbose mode.

Test: ./busytown/androidx_sandbox.sh
Change-Id: Idbd9686ec6b3e6e645f6cb3c8f86948097905ad4

androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx