Re-enable libcore.java.util.CalendarTest

Bug: 161420453
Test: art/tools/run-libcore-tests.sh --mode=host --variant=X32 \
  --debug --vm-arg -Xgc:gcstress -- libcore.java.util.CalendarTest
Change-Id: Ie5bb61da0a6e42d35dea44034df5415ff7b0c5bd
diff --git a/tools/libcore_gcstress_failures.txt b/tools/libcore_gcstress_failures.txt
index f0ad829..a23c0fd 100644
--- a/tools/libcore_gcstress_failures.txt
+++ b/tools/libcore_gcstress_failures.txt
@@ -46,7 +46,6 @@
   bug: 157520256,
   modes: [device],
   names: ["jsr166.ForkJoinPoolTest#testIsQuiescent",
-          "libcore.java.util.CalendarTest#testAllDefaultCalendar_Gregorian",
           "org.apache.harmony.tests.java.util.regex.MatcherTest#testAllCodePoints_P",
           "org.apache.harmony.tests.java.util.regex.MatcherTest#testAllCodePoints_p"]
 }