Copy to std::string when parsing LE audio config am: 37681976 am: b753dc57

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/17958688



Change-Id: I23fb973f7b495d031a8e990a6446d05c1de3c6c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>