[automerger skipped] BluetoothInCallService: Make sure non conference calls have indices starting from 1 am: 9ed889d6 -s ours

am skip reason: Merged-In I565e08c9019ce90c59e96d519417efeb65e5c39d with SHA-1 37b9e124 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/20601738



Change-Id: Ic0313c8834a762793965e72277925cac958a9c97
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>