le_audio: Do not configure device that has not contexts available am: 75b2d2e6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3345141



Change-Id: Ie7137a11d24652aab13745a50df1c1a02fa86726
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>