chromium.android: run resource_sizes on swarming.

Not sure this'll work, but if it does, it'll ensure that resource_sizes
runs with the perf merge script.

Bug: 861983
Change-Id: I8e62c92b5be4cdd429bdca00b05c98246e195f1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1573861
Commit-Queue: John Budorick <jbudorick@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Auto-Submit: John Budorick <jbudorick@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652237}

testing/buildbot/chromium.android.json

@@ -17997,7 +17997,12 @@
         },
         "name": "resource_sizes_cronet_sample_apk",
         "swarming": {
-          "can_use_on_swarming_builders": false
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-14.04"
+            }
+          ]
         }
       }
     ],
@@ -18059,7 +18064,12 @@
         },
         "name": "resource_sizes_cronet_sample_apk",
         "swarming": {
-          "can_use_on_swarming_builders": false
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-14.04"
+            }
+          ]
         }
       }
     ],
@@ -19044,7 +19054,12 @@
         },
         "name": "resource_sizes_cronet_sample_apk",
         "swarming": {
-          "can_use_on_swarming_builders": false
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-14.04"
+            }
+          ]
         }
       }
     ],

testing/buildbot/test_suites.pyl

@@ -2548,7 +2548,11 @@
           'script': '//tools/perf/process_perf_results.py',
         },
         'swarming': {
-          'can_use_on_swarming_builders': False,
+          'dimension_sets': [
+            {
+              'os': 'Ubuntu-14.04'
+            },
+          ],
         },
       },
     },