[WIP] Attempt at building grpc and p4runtime protocols with Bazel

STILL NOT WORKING AT RUNTIME

Change-Id: I1f9e60b12a12e09edad2a714ec2921a4f71c6d35
diff --git a/protocols/p4runtime/api/BUILD b/protocols/p4runtime/api/BUILD
index de7b487..531d734 100644
--- a/protocols/p4runtime/api/BUILD
+++ b/protocols/p4runtime/api/BUILD
@@ -1,7 +1,5 @@
-GRPC_VER = "1_3_1"
-
 COMPILE_DEPS = CORE_DEPS + [
-    "@grpc_core_" + GRPC_VER + "//jar",
+    "@io_grpc_grpc_java//core",
 ]
 
 TEST_DEPS = TEST + [