Fix an integer overflow bug in avdt_msg_asmbl am: bf9449a7 am: e49be903...

Fix an integer overflow bug in avdt_msg_asmbl am: bf9449a7 am: e49be903 am: cd6e6242 am: 7bfdb31d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/23152778



Change-Id: I1546900200cd62880a17d0c7967c71c37686525b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>