Add validation on attr type and size in a2dp_api.cc am: c5bc4c49 am: 414874c6 am: f77f5a5e

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



Change-Id: Iae516d5aaee5284059aae895781745adc7b01c28
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>