Format files and add gRPC stream support.

car/build.gradle

@@ -12,7 +12,7 @@ dependencies {
 task copyPythonCode(type: Copy, dependsOn: configurations.python){
     // Copy python protobuf code from proto project.
     from zipTree(configurations.python.asPath)
-    into './src'
+    into 'src'
 }
 
 task build(type: Exec, dependsOn: copyPythonCode) {