Restore the ability to build tee sink for debugging

This changelist does not enable tee sink, but makes it possible to do so.
Tee sink had suffered some bit rot since it is not built by default.

Also fixes a crash for > 2 byte per sample or > 2 channels.
Still does not write correct header for floating-point;
that will be best solved by moving to libsndfile.

Bug: 16990102
Change-Id: I8e92c588ccc513d7802d696fcfb324e815772df6