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

STILL NOT WORKING AT RUNTIME

Change-Id: I1f9e60b12a12e09edad2a714ec2921a4f71c6d35
diff --git a/protocols/grpc/api/BUILD b/protocols/grpc/api/BUILD
new file mode 100644
index 0000000..f7fee65
--- /dev/null
+++ b/protocols/grpc/api/BUILD
@@ -0,0 +1,3 @@
+osgi_jar (
+    deps = CORE_DEPS + ["@io_grpc_grpc_java//core"],
+)