Enforce one aconfig_declaration per aconfig package

Bug: b/319121098
Change-Id: Ibe3f1587ed7754f00f464cf385ce51ee9a142412
diff --git a/aconfig/codegen/java_aconfig_library_test.go b/aconfig/codegen/java_aconfig_library_test.go
index 8d54b5b..7361d44 100644
--- a/aconfig/codegen/java_aconfig_library_test.go
+++ b/aconfig/codegen/java_aconfig_library_test.go
@@ -34,7 +34,7 @@
 		RunTestWithBp(t, bp+`
 			aconfig_declarations {
 				name: "my_aconfig_declarations_foo",
-				package: "com.example.package",
+				package: "com.example.package.foo",
 				srcs: ["foo.aconfig"],
 			}
 
@@ -45,7 +45,7 @@
 
 			aconfig_declarations {
 				name: "my_aconfig_declarations_bar",
-				package: "com.example.package",
+				package: "com.example.package.bar",
 				srcs: ["bar.aconfig"],
 			}