qcom-common: separate A and B family media codecs to fix CTS failure

 - msm8960 does not support HW VP8 decoder and due to that CTS test failing
 - Create separate media_codec file for 8960 to remove HW VP8 decoder.

Change-Id: I160b970326c8c87c2e47a0950f633f2139dcdbec
Remove cm.dependencies
libril: fix crash in qcoms ril library during DIAL