Parallelize singleton execution

Bug: 281536768
Test: manual, presubmits
Change-Id: I57fdc76ba6b277e88e196b506af87127a530fd37
diff --git a/snapshot/host_fake_snapshot.go b/snapshot/host_fake_snapshot.go
index b04657d..c4cfbb5 100644
--- a/snapshot/host_fake_snapshot.go
+++ b/snapshot/host_fake_snapshot.go
@@ -75,7 +75,7 @@
 }
 
 func registerHostSnapshotComponents(ctx android.RegistrationContext) {
-	ctx.RegisterSingletonType("host-fake-snapshot", HostToolsFakeAndroidSingleton)
+	ctx.RegisterParallelSingletonType("host-fake-snapshot", HostToolsFakeAndroidSingleton)
 }
 
 type hostFakeSingleton struct {