Reflect new naming of isolate files for android_webview_test.

scripts/slave/recipe_modules/chromium_android/example.expected/coverage_builder_basic.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup index.lock",
@@ skipping 584 matching lines @@
       "[SLAVE_BUILD]/src/out/Release/coverage",
       "--host-driven-root",
       "[SLAVE_BUILD]/src/chrome/test",
       "--test-apk",
       "[SLAVE_BUILD]/src/out/Release/apks/AndroidWebViewTest.apk",
       "--apk-under-test",
       "[SLAVE_BUILD]/src/out/Release/apks/AndroidWebView.apk",
       "--additional-apk",
       "Additional.apk",
       "--isolate-file-path",
-      "android_webview/android_webview_test_apk.isolate",
+      "android_webview/android_webview_test_data.isolate",
       "--release",
       "--official-build"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "CHROMIUM_OUTPUT_DIR": "[SLAVE_BUILD]/src/out/Release"
     },
     "name": "Instrumentation test SmallTest"
   },
   {
@@ skipping 140 matching lines @@
     "~followup_annotations": [
       "@@@STEP_LINK@Coverage report@https://storage.cloud.google.com/chrome-code-coverage/java/coverage_builder/4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00/@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]