Add metrics for the command used in the registry CLI tool

Puts the metric in <project>/tools/commands_called

It counts the use of the tool, with the following labels:
- environment
- tool (nomulus/gtech)
- command called (class name)
- success true/false
- from the shell true/false

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=212879670

java/google/registry/tools/RegistryToolComponent.java

@@ -14,6 +14,7 @@
 
 package google.registry.tools;
 
+import com.google.monitoring.metrics.MetricWriter;
 import dagger.Component;
 import google.registry.config.CredentialModule;
 import google.registry.config.RegistryConfig.ConfigModule;
@@ -27,6 +28,7 @@ import google.registry.request.Modules.AppIdentityCredentialModule;
 import google.registry.request.Modules.DatastoreServiceModule;
 import google.registry.request.Modules.GoogleCredentialModule;
 import google.registry.request.Modules.Jackson2Module;
+import google.registry.request.Modules.NetHttpTransportModule;
 import google.registry.request.Modules.URLFetchServiceModule;
 import google.registry.request.Modules.UrlFetchTransportModule;
 import google.registry.request.Modules.UseAppIdentityCredentialForGoogleApisModule;
@@ -63,6 +65,7 @@ import javax.inject.Singleton;
       Jackson2Module.class,
       KeyModule.class,
       KmsModule.class,
+      NetHttpTransportModule.class,
       RdeModule.class,
       RegistryToolModule.class,
       SystemClockModule.class,
@@ -74,6 +77,7 @@ import javax.inject.Singleton;
       UserServiceModule.class,
       VoidDnsWriterModule.class,
       WhoisModule.class,
+      MetricToolModule.class,
     })
 interface RegistryToolComponent {
   void inject(CheckDomainClaimsCommand command);
@@ -111,4 +115,6 @@ interface RegistryToolComponent {
   void inject(WhoisQueryCommand command);
 
   AppEngineConnection appEngineConnection();
+
+  MetricWriter metricWriter();
 }