encoder: Update chroma modules to avoid reading an extra byte am: 45fb34a5a5 am: 9a3fdcc7b7

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libhevc/+/14008800

Change-Id: Id9b0544b8d5983c513bd5f2097e3a59445eb621d