audiopolicy: squashed support for pre-kitkat audio blobs

Squash of the following:

commit 40c41a743a4345ad26b6eab41755c5b474f75853
Author: chrmhoffmann <chrmhoffmann@gmail.com>
Date:   Sat Nov 29 19:32:27 2014 +0100

    pre kitkat audio legacy policy fix for hotword (ok google)

    Change-Id: I5bb90fb90f373461a98609226a5cea50ac5266e9

commit d47b306954b96142323c79b976edeb3eaa3b46dd
Author: chrmhoffmann <chrmhoffmann@gmail.com>
Date:   Sun Nov 23 18:22:35 2014 +0100
commit d47b306954b96142323c79b976edeb3eaa3b46dd
Author: chrmhoffmann <chrmhoffmann@gmail.com>
Date:   Sun Nov 23 18:22:35 2014 +0100

    pre-kitkat audio policy blobs re-activated.

    Change-Id: Idfcb03d0a4aa0a099bf5a17b7bf592ab402e3255

Change-Id: Iae65c6ccb6dcb120a6fc20978b8a69e6af39a51a