Currently vdc emits logs to stderr, which makes sense for command
line invocations, but when exec'ed they're silently dropped unless
the caller uses logwrapper.

avc: denied { read write } for path="/dev/pts/2" dev="devpts" ino=5 scontext=u:r:vdc:s0 tcontext=u:object_r:devpts:s0 tclass=chr_file permissive=0

Bug: 25796509
Change-Id: Ib92e0a7f580b1934a9853a83684f95b24bdc355c