build(bigquery): declare gax-grpc and grpc-api dependencies in pom.xml

Author: jinseopkim0

java-bigquery/google-cloud-bigquery/pom.xml

@@ -120,6 +120,15 @@
       <artifactId>arrow-memory-netty</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-grpc</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-api</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>com.google.errorprone</groupId>
       <artifactId>error_prone_annotations</artifactId>