Add ozone_unittests.filter to chromeos-betty-pi-arc-google-rel

To fix the ozone_unittests failures on the builder.

R=bpastene@chromium.org

Bug: 1000513
Change-Id: I11036939f0f8d61c5a9436d3db995fbe01768748
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829987Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Anushruth  <anushruth@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700866}

testing/buildbot/chrome.json

@@ -919,6 +919,9 @@
         "test": "ozone_gl_unittests"
       },
       {
+        "args": [
+          "--test-launcher-filter-file=../../testing/buildbot/filters/chromeos.ozone_unittests.filter"
+        ],
         "merge": {
           "args": [],
           "script": "//testing/merge_scripts/standard_gtest_merge.py"

testing/buildbot/test_suite_exceptions.pyl

@@ -1206,6 +1206,11 @@
           '--test-launcher-filter-file=../../testing/buildbot/filters/chromeos.ozone_unittests.filter',
         ],
       },
+      'chromeos-betty-pi-arc-google-rel': {
+        'args': [
+          '--test-launcher-filter-file=../../testing/buildbot/filters/chromeos.ozone_unittests.filter',
+        ],
+      },
       'linux-chromeos-google-rel': {
         'args': [
           '--test-launcher-filter-file=../../testing/buildbot/filters/chromeos.ozone_unittests.filter',