Tests: never use System.err

Always print stack traces to System.out, and replace all
System.err.println()'s with System.out.println().

Follow-up of https://android-review.googlesource.com/#/c/187020/ and
https://android-review.googlesource.com/#/c/407032/.

Test: m test-art-host
      m test-art-target
Change-Id: I9ab9cd955a8db25b2ec6673790e5bc924f62c88a
diff --git a/test/492-checker-inline-invoke-interface/src/Main.java b/test/492-checker-inline-invoke-interface/src/Main.java
index a919690..785c0db 100644
--- a/test/492-checker-inline-invoke-interface/src/Main.java
+++ b/test/492-checker-inline-invoke-interface/src/Main.java
@@ -21,7 +21,7 @@
 class ForceStatic {
   static {
     System.out.println("Hello from clinit");
-    new Exception().printStackTrace();
+    new Exception().printStackTrace(System.out);
   }
   static int field;
 }