aflags: read protos from all containers

Create one library for reading protos from all containers, instead of
having numerous libraries perform the same logic. For Java, we will
create a similar library reusing the same
partition_aconfig_flags_paths.txt.

Bug: 324436145
Test: adb shell aflags list # Confirm that various containers appear
Change-Id: I924e281a50f9a609e1c07c03267eebe3dce52752
diff --git a/tools/aconfig/aflags/src/main.rs b/tools/aconfig/aflags/src/main.rs
index 1c453c5..4ce0d35 100644
--- a/tools/aconfig/aflags/src/main.rs
+++ b/tools/aconfig/aflags/src/main.rs
@@ -25,6 +25,8 @@
 mod aconfig_storage_source;
 use aconfig_storage_source::AconfigStorageSource;
 
+mod load_protos;
+
 #[derive(Clone, PartialEq, Debug)]
 enum FlagPermission {
     ReadOnly,