[applyConstraints] Add checks on noiseSuppression and autoGainControl.

Two constraints have been missing for a long time in applyConstraints in
that the constraint per-se was never applied. This was caused by a check
in media_stream_track.cc that would verify whether the set of
constraints was empty.

The constraints are also overlapping with goog* constraints, hence we
needed renaming of the properties, so that the signaling to the
information to the application level is correct.

This change now adds testing for OverconstrainedError for these
constraints, as well as fixing the check.

BUG=923828

Change-Id: I26a72d8aef4f749f7309092787f7929de2239978
Reviewed-on: https://chromium-review.googlesource.com/c/1426679
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Commit-Queue: Armando Miraglia <armax@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625632}