add lite runtime option to android_channel.proto

git-svn-id: http://google-cache-invalidation-api.googlecode.com/svn/trunk@330 1cc9d426-c294-39be-ba72-c0199ca0f247
diff --git a/src/google/cacheinvalidation/android_channel.proto b/src/google/cacheinvalidation/android_channel.proto
index 6eb6c3a..1e6a1fb 100644
--- a/src/google/cacheinvalidation/android_channel.proto
+++ b/src/google/cacheinvalidation/android_channel.proto
@@ -19,6 +19,8 @@
 
 syntax = "proto2";
 
+option optimize_for = LITE_RUNTIME;
+
 package ipc.invalidation;
 
 import "client_protocol.proto";