java link time error improve

Asked about error message including "against private API.Adjust
sdk_version", which is a bit hard to parse due to missing space. Also
tried to make error message less verbose, so that it is more clear what
to do, and fixed a grammar mistake.

Bug: N/A
Test: N/A
Change-Id: Ib9a30d86b5cb0e9b3b7d5576ecb9498a9b316042
diff --git a/java/java.go b/java/java.go
index d049685..4c3363a 100644
--- a/java/java.go
+++ b/java/java.go
@@ -962,7 +962,9 @@
 		return
 	}
 	otherLinkType, _ := to.getLinkType(ctx.OtherModuleName(to))
-	commonMessage := "Adjust sdk_version: property of the source or target module so that target module is built with the same or smaller API set than the source."
+	commonMessage := " In order to fix this, consider adjusting sdk_version: OR platform_apis: " +
+		"property of the source or target module so that target module is built with the same " +
+		"or smaller API set when compared to the source."
 
 	switch myLinkType {
 	case javaCore: