Merge "Add nullability check to fix crash" into main

        if (localBtManager == null) return null;

        LocalBluetoothLeBroadcast broadcast =

                localBtManager.getProfileManager().getLeAudioBroadcastProfile();

        if (!broadcast.isEnabled(null)) return null;

        if (broadcast == null || !broadcast.isEnabled(null)) return null;

        int primaryGroupId = getPrimaryGroupIdForBroadcast(contentResolver);

        if (primaryGroupId == BluetoothCsipSetCoordinator.GROUP_ID_INVALID) return null;

        LocalBluetoothLeBroadcastAssistant assistant =