Build dexpreopt_tools.zip in soong

For soong-only builds.

Bug: 398028319
Test: diff'd zip file before/after, they're the same
Change-Id: I6b480f4185546f3b61d81ad80f0fe1db6bafb133
diff --git a/java/sdk.go b/java/sdk.go
index ab1c653..73262da 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -382,7 +382,7 @@
 
 	rule.Build("api_fingerprint", "generate api_fingerprint.txt")
 
-	if ctx.Config().BuildOS == android.Linux {
+	if ctx.Config().BuildOS.Linux() {
 		ctx.DistForGoals([]string{"sdk", "droidcore"}, out)
 	}
 }