AVCustomizations: Enable 16 and 24 bit PCM offload.

-create extended decoder and renderer
-add change to pass bit width and format info to renderer.
-add changes for time stamp calculation.
-Enables 24 bit PCM and 16 Bit PCM playback in
NuPlayer via direct PCM, if it is allowed.

Change-Id: I3363140fad441a7746884076c40b46e777f2e06e