Run monochrome_apk_checker on device-less Ubuntu bots.

Apparently the test never uses a device. So let's move it to a device-less
pool.

Bug: None
Change-Id: I96bca98916c769ea02859b44dc822582a6408539
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1606221
Commit-Queue: Ben Pastene <[email protected]>
Auto-Submit: Ben Pastene <[email protected]>
Reviewed-by: Erik Chen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#729443}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index 2fe8623..2db829df 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -912,6 +912,45 @@
     },
   },
   'monochrome_apk_checker': {
+    'modifications': {
+      'ToTAndroid': {
+        'swarming': {
+          'dimension_sets': [
+            {
+              'device_os': None,
+              'device_playstore_version': None,
+              'device_type': None,
+              'os': 'Ubuntu-16.04',
+            },
+          ],
+        },
+      },
+      'android-arm64-proguard-rel': {
+        'swarming': {
+          'dimension_sets': [
+            {
+              'device_os': None,
+              'device_playstore_version': None,
+              'device_type': None,
+              'os': 'Ubuntu-16.04',
+            },
+          ],
+        },
+      },
+      'android-pie-arm64-rel': {
+        'swarming': {
+          'dimension_sets': [
+            {
+              'device_os': None,
+              'device_os_flavor': None,
+              'device_playstore_version': None,
+              'device_type': None,
+              'os': 'Ubuntu-16.04',
+            },
+          ],
+        },
+      },
+    },
     'remove_from': [
       # Don't run on trybots, which don't use proguard.
       # https://crbug.com/1029936.