am d8133f4a: Fix valgrind error in media scanner (http://b/issue?id=2210270) caused by copying a string without its 0 terminator.

Merge commit 'd8133f4acad121b19da9961ed03b7c1084b89276' into eclair-mr2

* commit 'd8133f4acad121b19da9961ed03b7c1084b89276':
  Fix valgrind error in media scanner (http://b/issue?id=2210270) caused