Add validation on attr type and size in a2dp_api.cc am: c5bc4c49 am: 414874c6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/24638582



Change-Id: I4115422e08184925d891eece2b21f011a3447b5f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>