Add Java options for a correct generation

src/blockchain_region_param_v1.proto

@@ -1,6 +1,9 @@
 syntax = "proto3";
 
 package helium;
+option java_package = "xyz.nova.grpc";
+option java_outer_classname = "regionparam";
+option java_multiple_files = true;
 
 message blockchain_region_params_v1 {
   repeated blockchain_region_param_v1 region_params = 1;

src/region.proto

@@ -1,6 +1,9 @@
 syntax = "proto3";
 
 package helium;
+option java_package = "xyz.nova.grpc";
+option java_outer_classname = "IotRegion";
+option java_multiple_files = true;
 
 enum region {
   US915 = 0;

src/service/iot_config.proto

@@ -1,6 +1,9 @@
 syntax = "proto3";
 
 package helium.iot_config;
+option java_package = "xyz.nova.grpc";
+option java_outer_classname = "IotConfig";
+option java_multiple_files = true;
 
 import "blockchain_region_param_v1.proto";
 import "region.proto";