Simplify app data files

Use utils.THIRD_PARTY and utils.get_android_jar

Change-Id: Ie6fd234b5cee27b1ab73da18e87ec9de930aeadb
diff --git a/tools/nest_data.py b/tools/nest_data.py
index af3e35a..92435f6 100644
--- a/tools/nest_data.py
+++ b/tools/nest_data.py
@@ -1,19 +1,18 @@
-# Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
+# Copyright (c) 2018, the R8 project authors. Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 import os
 import utils
 
-THIRD_PARTY = os.path.join(utils.REPO_ROOT, 'third_party')
 ANDROID_L_API = '21'
-BASE = os.path.join(THIRD_PARTY, 'nest')
+BASE = os.path.join(utils.THIRD_PARTY, 'nest')
 
 V20180926_BASE = os.path.join(BASE, 'nest_20180926_7c6cfb')
 
 # NOTE: we always use android.jar for SDK v25, later we might want to revise it
-#       to use proper android.jar version for each of youtube version separately.
-ANDROID_JAR = os.path.join(THIRD_PARTY, 'android_jar', 'lib-v25', 'android.jar')
+#       to use proper android.jar version for each of nest version separately.
+ANDROID_JAR = utils.get_android_jar(25)
 
 VERSIONS = {
   '20180926': {