le_audio: Add two source requirements for conversational context am: 64347dfe am: 7d5ad0be

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



Change-Id: Icca8b20f93b27f1c827d3c49da72abeabffd223c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>