Enable arch variant properties in prebuilt_etc.

Bug: 122332178
Test: Soong unit tests + TreeHugger.
Change-Id: Ia8fab0add09478599398e8cbb703debc39f658f6
diff --git a/java/java_test.go b/java/java_test.go
index 7a37b7b..6437c0c 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -861,7 +861,7 @@
 	ctx.ModuleForTests("foo"+sdkDocsSuffix, "android_common")
 	ctx.ModuleForTests("foo"+sdkDocsSuffix+sdkSystemApiSuffix, "android_common")
 	ctx.ModuleForTests("foo"+sdkDocsSuffix+sdkTestApiSuffix, "android_common")
-	ctx.ModuleForTests("foo"+sdkXmlFileSuffix, "android_common")
+	ctx.ModuleForTests("foo"+sdkXmlFileSuffix, "android_arm64_armv8-a")
 	ctx.ModuleForTests("foo.api.public.28", "")
 	ctx.ModuleForTests("foo.api.system.28", "")
 	ctx.ModuleForTests("foo.api.test.28", "")