Update package names to work with the proto3 compiler

Bug: b/28974522
Change-Id: Ib442b050bafb4769cf9ce6998e7a4f9708ba3625
diff --git a/java/src/com/google/polo/wire/protobuf/ProtobufWireAdapter.java b/java/src/com/google/polo/wire/protobuf/ProtobufWireAdapter.java
index ea3a7cb..50c8035 100644
--- a/java/src/com/google/polo/wire/protobuf/ProtobufWireAdapter.java
+++ b/java/src/com/google/polo/wire/protobuf/ProtobufWireAdapter.java
@@ -32,7 +32,8 @@
 import com.google.polo.pairing.message.SecretAckMessage;
 import com.google.polo.pairing.message.SecretMessage;
 import com.google.polo.wire.PoloWireInterface;
-import com.google.polo.wire.protobuf.PoloProto.OuterMessage;
+import com.google.polo.wire.protobuf.nano.PoloProto;
+import com.google.polo.wire.protobuf.nano.PoloProto.OuterMessage;
 import com.google.protobuf.nano.MessageNano;
 
 import java.io.IOException;