Rebase oscillator tests on Android

These three oscillator tests no longer pass on Android. Manually
verified that the difference between these new files and the original
expected results is at most about 10 (out of 32768). I did not
investigate why, but most likely these failures are caused by some of
these tests being updated on linux a short while ago.

BUG=407383

Review URL: https://codereview.chromium.org/480173005

git-svn-id: svn://svn.chromium.org/blink/trunk@180915 bbb929c8-8fbe-4397-9dbb-9b2b20218538