Temporarily ignore `CharacterTest#test_getType_I` test failures.

This test seems to be failing when run on the ART Buildbot (LUCI)
since its recent update (in aosp/1904011), presumably because it
is run against old ICU prebuilts that need to be updated.
Temporarily ignore these failures until the issue is properly
addressed.

Test: Run Libcore test with `art/tools/run-libcore-tests.sh`
Bug: 209995834
Change-Id: I72919bc5649db8bc7fc530044ae4297f2ea2f78c
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index 1280038..e7e6ded 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -283,5 +283,11 @@
           "libcore.javax.net.ssl.DefaultHostnameVerifierTest#testSubjectWithWildAltNamesCert",
           "libcore.javax.net.ssl.DefaultHostnameVerifierTest#testWildAltNameOnlyCert"],
   bug: 166619732
+},
+{
+  description: "Failure due to new test (updated in aosp/1904011) running against old ICU prebuilts. ",
+  result: EXEC_FAILED,
+  names: ["org.apache.harmony.tests.java.lang.CharacterTest#test_getType_I"],
+  bug: 209995834
 }
 ]