Enable render test buildbot results on bot on chromium.android.

testing/buildbot/chromium.android.json

 {
   "Android Cronet Builder": {
     "additional_compile_targets": [
       "cronet_package"
     ]
   },
   "Android N5X Swarm Builder": {
     "gtest_tests": [
       {
         "override_compile_targets": [
@@ skipping 2893 matching lines @@
             }
           ]
         },
         "test": "cc_unittests"
       },
       {
         "override_compile_targets": [
           "chrome_public_test_apk"
         ],
         "override_isolate_target": "chrome_public_test_apk",
+        "render_results_dir": "chrome/test/data/android/render_tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "cipd_packages": [
             {
               "cipd_package": "infra/tools/luci/logdog/butler/${platform}",
               "location": "bin",
               "revision": "git_revision:25755a2c316937ee44a6432163dc5e2f9c85cf58"
             }
           ],
           "dimension_sets": [
@@ skipping 881 matching lines @@
       },
       {
         "test": "chrome_sync_shell_test_apk"
       },
       {
         "test": "content_shell_test_apk"
       }
     ]
   }
 }