fix: Add gax-grpc dependency for native image configurations (#688)

* fix: add gax-grpc to bring in native image configurations

Author: mpeddada1

Diff for: java-compute/google-cloud-compute/pom.xml

@@ -35,6 +35,14 @@
       <groupId>com.google.api</groupId>
       <artifactId>gax</artifactId>
     </dependency>
+
+    <!-- gax-grpc brings in Protobuf reflection configurations which are needed
+    for native image compilation. -->
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-grpc</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-httpjson</artifactId>

Diff for: java-compute/pom.xml

@@ -96,6 +96,7 @@
             <ignoredUnusedDeclaredDependencies>
               <ignoredUnusedDeclaredDependency>org.objenesis:objenesis</ignoredUnusedDeclaredDependency>
               <ignoredUnusedDeclaredDependency>javax.annotation:javax.annotation-api</ignoredUnusedDeclaredDependency>
+              <ignoredUnusedDeclaredDependency>com.google.api:gax-grpc</ignoredUnusedDeclaredDependency>
             </ignoredUnusedDeclaredDependencies>
           </configuration>
         </plugin>