libcyanogen-dsp for CM9

This commit discards history. Those interested in code archeology
are encouraged to look up the gingerbread branch.

Changes since CM7:

Spurious whitespace has been corrected and all tabs have been replaced
by spaces. Biquads now use 64-bit double for calculation to yield
improved precision of the coefficients.

Some checks for parameter and value sizes have been added, which
corrects CM7's improper usage of the OpenSL command API. These changes
require the new DSPManager to be properly tested (currently unmerged
but available under gerrit).

Change-Id: I62444fe6bdf3800294da46ffe6089879575dc364