Adding pom files for P4Runtime and GRPC

Change-Id: I9e205fc054875813200fe83a0bca4a9152ec66ae
diff --git a/protocols/p4runtime/api/pom.xml b/protocols/p4runtime/api/pom.xml
index 0d31cb5..79e797f 100644
--- a/protocols/p4runtime/api/pom.xml
+++ b/protocols/p4runtime/api/pom.xml
@@ -14,7 +14,6 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
@@ -30,4 +29,10 @@
     <artifactId>onos-protocols-p4runtime-api</artifactId>
     <packaging>bundle</packaging>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-api</artifactId>
+        </dependency>
+    </dependencies>
 </project>