Re-enable ParallelGC test for gcstress mode

Ran the test hundreds of times with gcstress without any failures.

Bug: 16406852
Change-Id: Idd2d248bd43bfb20ad7313e12ce3dce85bea3de5
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index 2abf48e..fd66a02 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -214,8 +214,7 @@
 TEST_ART_BROKEN_NO_RELOCATE_TESTS :=
 
 # Tests that are broken with GC stress.
-TEST_ART_BROKEN_GCSTRESS_RUN_TESTS := \
-  114-ParallelGC
+TEST_ART_BROKEN_GCSTRESS_RUN_TESTS :=
 
 ifneq (,$(filter gcstress,$(GC_TYPES)))
   ART_TEST_KNOWN_BROKEN += $(call all-run-test-names,$(TARGET_TYPES),$(RUN_TYPES),$(PREBUILD_TYPES), \