Update package names to work with the proto3 compiler

Bug: b/28974522
Change-Id: I5f3adf4946ee4ba1e09e4f40afe83c151405972a
(cherry picked from commit f4f62cfb2d93637880279a7eb5b9ce2f6bddce82)
diff --git a/protos/launcher_log.proto b/protos/launcher_log.proto
index 448cf64..6b27559 100644
--- a/protos/launcher_log.proto
+++ b/protos/launcher_log.proto
@@ -15,7 +15,7 @@
  */
 syntax = "proto2";
 
-option java_package = "com.android.launcher3.userevent.nano";
+option java_package = "com.android.launcher3.userevent";
 option java_outer_classname = "LauncherLogProto";
 
 package userevent;