Variable DEFAULT_APS_OPTIONSConst

NOTE: This from SDK is currently ignored here because of issues in below links:

• BUGZID 12261: Concentrators use MTORRs for route discovery and should not enable route discovery in the APS options.
• https://community.silabs.com/s/question/0D58Y00008DRfDCSA1/coordinator-cant-send-unicast-to-sleepy-node-after-reboot
• https://community.silabs.com/s/question/0D58Y0000B4nTb7SQE/largedense-network-communication-problem-source-route-table-not-big-enough

Removing ENABLE_ROUTE_DISCOVERY leads to devices that won't reconnect/go offline, and various other issues. Keeping it for now.