Enforce one aconfig_declaration per aconfig package

Bug: b/319121098
Change-Id: Ibe3f1587ed7754f00f464cf385ce51ee9a142412
diff --git a/java/app_test.go b/java/app_test.go
index 3ee94d5..362bef9 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -4347,14 +4347,14 @@
 		}
 		aconfig_declarations {
 			name: "bar",
-			package: "com.example.package",
+			package: "com.example.package.bar",
 			srcs: [
 				"bar.aconfig",
 			],
 		}
 		aconfig_declarations {
 			name: "baz",
-			package: "com.example.package",
+			package: "com.example.package.baz",
 			srcs: [
 				"baz.aconfig",
 			],