Introduce LE Audio software provider for bluetooth audio 2.1 am: b5f2d23e26 am: a1663edb70 am: 9e834165ad am: 8e5eb20aad

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1404810

Change-Id: If8fda8b0ad4ee39ffd7d4a6df048efe758f456bd