Skip test.java.util.TestFormatter on gcstress debug config am: bfd5c475a2

Original change: https://android-review.googlesource.com/c/platform/art/+/2975493

Change-Id: I104ec24d417f4372336ad4391a74e540a16e4eef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>