Bug 1258787 - Add checkstyle to tasks to run for gradle deps; update watched files. r=nalexander

We now watch the gradle deps sub config too.

MozReview-Commit-ID: 37XTA4xnrFc

--HG--
extra : rebase_source : 4a81682feda87864cf892f0658a2ea816ab3bd50

testing/mozharness/configs/builds/releng_sub_android_configs/64_api_15_gradle_dependencies.py

@@ -10,6 +10,7 @@ config = {
          'assembleAutomationRelease',
          'assembleAutomationDebug',
          'assembleAutomationDebugAndroidTest',
+         'checkstyle',
         ],
     ],
 }

testing/taskcluster/tasks/branches/base_jobs.yml

@@ -297,6 +297,7 @@ tasks:
     when:
       file_patterns:
         - 'testing/docker/android-gradle-build/**'
+        - 'testing/mozharness/configs/builds/releng_sub_android_configs/*gradle_dependencies.py'
         - '**/*.gradle'
   android-checkstyle:
     task: tasks/builds/android_checkstyle.yml