Fix handling invalid header length am: 6444ca61c2 am: a53702a4d3

Original change: https://android-review.googlesource.com/c/platform/external/obex/+/3152137

Change-Id: I63849bb1338cca2651a8cabdb462deece028d2be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>