msm8974: Update media codec list

 * Add all FFMPEG decoders now that the turf war is resolved.

Change-Id: I909529805481356abefcb3d0b254b2da0163cd37
Merge "msm8974: Update media codec list" into kk4.4
Merge remote-tracking branch 'SlimRoms_device_oppo_msm8974-common/kk4.4' into kk4.4