LeAudio: Fix broadcast quality index conversion to AIDL

This fixes the codec extensibility layer using wrong define during the
quality index conversion. This caused the bad broadcast quality.

Bug: 308428644
Bug: 313054645
Test: atest bluetooth-test-audio-hal-aidl-leaudio-utils
Change-Id: Ibdabc8593a225c7d805eb4d1eea3d11509ac0b6d