Change OnlyPreoptBootImageAndSystemServer to OnlyPreoptArtBootImage.

OnlyPreoptBootImageAndSystemServer was for making the eng build faster.
This change makes it even faster.

Bug: 309011617
Test: Presubmit
Change-Id: If9001e99593b57deafa7b56f0ca6b3d4d80f56d3
diff --git a/java/dexpreopt_check.go b/java/dexpreopt_check.go
index 7499481..33be603 100644
--- a/java/dexpreopt_check.go
+++ b/java/dexpreopt_check.go
@@ -68,7 +68,7 @@
 
 	// The check should be skipped on unbundled builds because system server jars are not preopted on
 	// unbundled builds since the artifacts are installed into the system image, not the APEXes.
-	if global.DisablePreopt || len(targets) == 0 || ctx.Config().UnbundledBuild() {
+	if global.DisablePreopt || global.OnlyPreoptArtBootImage || len(targets) == 0 || ctx.Config().UnbundledBuild() {
 		return
 	}