build system implementation for c/cpp test mode codegen

Bug: b/300488560
Test: added unit test and tested with AconfigDemoActivity app
Change-Id: I6ad71cc2dada8feb53662ec47c8acad5bc43d5ce
diff --git a/aconfig/Android.bp b/aconfig/Android.bp
index d2ddfdf..faa4ddb 100644
--- a/aconfig/Android.bp
+++ b/aconfig/Android.bp
@@ -32,6 +32,8 @@
         "aconfig_values_test.go",
         "aconfig_value_set_test.go",
         "java_aconfig_library_test.go",
+        "cc_aconfig_library_test.go",
+        "rust_aconfig_library_test.go",
     ],
     pluginFor: ["soong_build"],
 }