[automerger skipped] Fix unused import.
am: 410fecd70b -s ours
am skip reason: change_id I5664e4778f91c1e6944db1106c314820196238cb with SHA1 7ff5e2a888 is in history

Change-Id: I68f3ceb124d8632d23c7ff9b891b5cfa8257f9d3