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/084-class-init/src/Main.java b/test/084-class-init/src/Main.java
index 28eb3e9..a60fbac 100644
--- a/test/084-class-init/src/Main.java
+++ b/test/084-class-init/src/Main.java
@@ -24,7 +24,7 @@
         // that is currently a resolution stub because it's running on behalf of <clinit>.
         try {
             throwDuringClinit();
-            System.err.println("didn't throw!");
+            System.out.println("didn't throw!");
         } catch (NullPointerException ex) {
             System.out.println("caught exception thrown during clinit");
         }
@@ -44,34 +44,34 @@
         try {
             Thread.sleep(msec);
         } catch (InterruptedException ie) {
-            System.err.println("sleep interrupted");
+            System.out.println("sleep interrupted");
         }
     }
 
     static void checkExceptions() {
         try {
             System.out.println(PartialInit.FIELD0);
-            System.err.println("Construction of PartialInit succeeded unexpectedly");
+            System.out.println("Construction of PartialInit succeeded unexpectedly");
         } catch (ExceptionInInitializerError eiie) {
             System.out.println("Got expected EIIE for FIELD0");
         }
 
         try {
             System.out.println(PartialInit.FIELD0);
-            System.err.println("Load of FIELD0 succeeded unexpectedly");
+            System.out.println("Load of FIELD0 succeeded unexpectedly");
         } catch (NoClassDefFoundError ncdfe) {
             System.out.println("Got expected NCDFE for FIELD0");
         }
         try {
             System.out.println(PartialInit.FIELD1);
-            System.err.println("Load of FIELD1 succeeded unexpectedly");
+            System.out.println("Load of FIELD1 succeeded unexpectedly");
         } catch (NoClassDefFoundError ncdfe) {
             System.out.println("Got expected NCDFE for FIELD1");
         }
 
         try {
             System.out.println(Exploder.FIELD);
-            System.err.println("Load of FIELD succeeded unexpectedly");
+            System.out.println("Load of FIELD succeeded unexpectedly");
         } catch (AssertionError expected) {
             System.out.println("Got expected '" + expected.getMessage() + "' from Exploder");
         }
@@ -92,7 +92,7 @@
             fieldThread.join();
             methodThread.join();
         } catch (InterruptedException ie) {
-            System.err.println(ie);
+            System.out.println(ie);
         }
 
         /* print all values */