Add a nano proto version of aconfig protos

Framework already has nano protos, and reusing them won't
introduce extra dependencies for the apps
This is setting up the resources flagging in the framework

Bug: 297373084
Test: Built with related changes
Change-Id: I518bd56f56c42e0adef0002e95f8948e0904fb43

tools/aconfig/aconfig_protos/Android.bp

@@ -17,7 +17,22 @@ java_library {
     apex_available: [
         "com.android.configinfrastructure",
         "//apex_available:platform",
-    ]
+    ],
+}
+
+java_library {
+    name: "libaconfig_java_proto_nano",
+    srcs: ["protos/aconfig.proto"],
+    static_libs: ["libprotobuf-java-nano"],
+    proto: {
+        type: "nano",
+    },
+    sdk_version: "current",
+    min_sdk_version: "UpsideDownCake",
+    apex_available: [
+        "//apex_available:platform",
+    ],
+    jarjar_rules: "jarjar-nano-rules.txt",
 }
 
 java_library_host {
@@ -58,7 +73,7 @@ rust_defaults {
     ],
     proc_macros: [
         "libpaste",
-    ]
+    ],
 }
 
 rust_library {

tools/aconfig/aconfig_protos/jarjar-nano-rules.txt

@@ -0,0 +1 @@
+rule com.google.protobuf.** android.internal.framework.protobuf.@1