Make software codecs as VNDK

Software codecs and their dependencies are marked as VNDK (or just
vendor_available:true for static/header libs).

Bug: 37343418
Test: build the software codecs with BOARD_VNDK_VERSION=current
Change-Id: I9e628d0646fd8a28f8e741cde5ef0c30b79c21ae
1 file changed