Add t.Parallel() to java tests

Speeds up go test ./java from 32 seconds to 9 seconds.

Test: go test ./java
Change-Id: I4c6640e787c0744c6dfda03b7382839b452e24cf
diff --git a/java/rro_test.go b/java/rro_test.go
index b946511..1978ad6 100644
--- a/java/rro_test.go
+++ b/java/rro_test.go
@@ -24,6 +24,7 @@
 )
 
 func TestRuntimeResourceOverlay(t *testing.T) {
+	t.Parallel()
 	fs := android.MockFS{
 		"baz/res/res/values/strings.xml": nil,
 		"bar/res/res/values/strings.xml": nil,
@@ -129,6 +130,7 @@
 }
 
 func TestRuntimeResourceOverlay_JavaDefaults(t *testing.T) {
+	t.Parallel()
 	result := android.GroupFixturePreparers(
 		PrepareForTestWithJavaDefaultModules,
 		android.FixtureModifyConfig(android.SetKatiEnabledForTests),