aconfig: add flag info field to proto

Bug: b/321077378
Test: m
Change-Id: I1b974f83ea49e8d4b19b3392cb7feab3d4b3fcdc
diff --git a/tools/aconfig/aconfig_storage_file/protos/aconfig_storage_metadata.proto b/tools/aconfig/aconfig_storage_file/protos/aconfig_storage_metadata.proto
index c6728bd..e1c1c7f 100644
--- a/tools/aconfig/aconfig_storage_file/protos/aconfig_storage_metadata.proto
+++ b/tools/aconfig/aconfig_storage_file/protos/aconfig_storage_metadata.proto
@@ -26,7 +26,8 @@
   optional string package_map = 3;
   optional string flag_map = 4;
   optional string flag_val = 5;
-  optional int64 timestamp = 6;
+  optional string flag_info = 6;
+  optional int64 timestamp = 7;
 }
 
 message storage_files {