le_audio: Add two source requirements for conversational context am: 64347dfe am: d6b8a17f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/17618242



Change-Id: Iefef658d8299756922b060a227015ca37e2e71d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>