SPDIFEncoder: EAC3 fixes from NVidia

These fixes were suggested by NVidia
https://android-review.googlesource.com/#/c/158460/1

Bug: 22351015
Change-Id: I4da4885360b191e1835c0f2762efc32f51942d66
Signed-off-by: Phil Burk <philburk@google.com>
4 files changed