[MediaSession, Test] Move MediaSession test data to all-platforms directory

chrome/chrome_public_test_apk.isolate

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'conditions': [
     ['OS=="android"', {
       'variables': {
         'files': [
           '<(DEPTH)/chrome/test/data/android/',
           '<(DEPTH)/chrome/test/data/banners/',
           '<(DEPTH)/chrome/test/data/encoding_tests/auto_detect/Big5_with_no_encoding_specified.html',
           '<(DEPTH)/chrome/test/data/geolocation/',
           '<(DEPTH)/chrome/test/data/google/',
           '<(DEPTH)/chrome/test/data/image_search/valid.png',
           '<(DEPTH)/chrome/test/data/navigation_interception/',
           '<(DEPTH)/chrome/test/data/notifications/',
           '<(DEPTH)/chrome/test/data/popup_blocker/',
           '<(DEPTH)/chrome/test/data/push_messaging/',
           '<(DEPTH)/chrome/test/data/translate/',
           '<(DEPTH)/chrome/test/data/webapps/',
           '<(DEPTH)/chrome/test/media_router/resources/',
           '<(DEPTH)/content/test/data/android/geolocation.html',
-          '<(DEPTH)/content/test/data/android/media/',
           '<(DEPTH)/content/test/data/media/getusermedia.html',
+          '<(DEPTH)/content/test/data/media/session/',
           '<(DEPTH)/content/test/data/media/webrtc_test_utilities.js',
         ],
       },
     }],
   ],
 }