Parallelize singleton execution

Bug: 281536768
Test: manual, presubmits
Change-Id: I57fdc76ba6b277e88e196b506af87127a530fd37
diff --git a/dexpreopt/config.go b/dexpreopt/config.go
index 0cc3bd6..e61ebe6 100644
--- a/dexpreopt/config.go
+++ b/dexpreopt/config.go
@@ -197,7 +197,7 @@
 
 func init() {
 	pctx.Import("android/soong/android")
-	android.RegisterSingletonType("dexpreopt-soong-config", func() android.Singleton {
+	android.RegisterParallelSingletonType("dexpreopt-soong-config", func() android.Singleton {
 		return &globalSoongConfigSingleton{}
 	})
 }