Update codec tests for Android.

I verified manually that the new files differ from the original expected
results by a few bits. I did not investigate the underlying cause for
the difference, but I suspect some changes in ffmpeg is causing these
differences.  Android was using the linux files for the expected
results so changes in ffmpeg can cause Android results to differ since
WebAudio uses Android's MediaCodec framework to decode audio files.

BUG=407368
TBR=dalecurtis@chromium.org

Review URL: https://codereview.chromium.org/501213002

git-svn-id: svn://svn.chromium.org/blink/trunk@181831 bbb929c8-8fbe-4397-9dbb-9b2b20218538