Merge "le_audio: Introduce broadcast audio session created event" into main am: e9157ecf

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3139473



Change-Id: I34ed2f293d10e244bd3f75a9cd626ad26e2e3df8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>