* Horizon: Implement arp:r and arp:w services * Fix formatting * Remove HLE arp services * Revert "Remove HLE arp services" This reverts commit c576fcccadb963db56b96bacabd1c1ac7abfb1ab. * Keep LibHac impl since it's used in bcat * Addresses gdkchan's feedback * ArpApi in PrepoIpcServer and remove LmApi * Fix 2 * Fixes ArpApi init * Fix encoding * Update PrepoService.cs * Fix prepo