Move slice increments after completing header parsing am: dc110841d6 am: 9ab629f2b2 am: 2a1fd9a360 am: d2fa8b5c63 am: eff1d4e7cb

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

Change-Id: I050d8811c11ff326dc999119d30a5042940d2c32