Move slice increments after completing header parsing am: dc110841d6 am: 9ab629f2b2 am: 2a1fd9a360 am: d2fa8b5c63 am: 7cabba7829 am: 2700b8c2ec am: 1380df99c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libavc/+/16407185

Change-Id: I0351d013b18b3df6dc8098f18cdfd2d4fc5687cd