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/077-method-override/src/Main.java b/test/077-method-override/src/Main.java
index 84bdf35..3a3c528 100644
--- a/test/077-method-override/src/Main.java
+++ b/test/077-method-override/src/Main.java
@@ -37,8 +37,8 @@
             ((Base)derived).overrideVirtualWithStatic();
         } catch (NoSuchMethodError nsme) {
             /* NSME is subclass of ICCE, so check it explicitly */
-            System.err.println("Got NSME - ovws");
-            nsme.printStackTrace(System.err);
+            System.out.println("Got NSME - ovws");
+            nsme.printStackTrace(System.out);
         } catch (IncompatibleClassChangeError icce) {
             System.out.println("Got expected exception - ovws");
         }
@@ -46,8 +46,8 @@
         try {
             ((Base)derived).overrideStaticWithVirtual();
         } catch (NoSuchMethodError nsme) {
-            System.err.println("Got NSME - oswv");
-            nsme.printStackTrace(System.err);
+            System.out.println("Got NSME - oswv");
+            nsme.printStackTrace(System.out);
         } catch (IncompatibleClassChangeError icce) {
             System.out.println("Got expected exception - oswv");
         }