Roll android_tools repo

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 393 matching lines @@
      Var('chromium_git') + '/external/fontconfig.git' + '@' + 'f16c3118e25546c1b749f9823c51827a60aeb5c1',
 
     'src/third_party/stp/src':
      Var('chromium_git') + '/external/github.com/stp/stp.git' + '@' + 'fc94a599207752ab4d64048204f0c88494811b62',
   },
   'android': {
     'src/third_party/android_protobuf/src':
      Var('chromium_git') + '/external/android_protobuf.git' + '@' + '999188d0dc72e97f7fe08bb756958a2cf090f4e7',
 
     'src/third_party/android_tools':
-     Var('chromium_git') + '/android_tools.git' + '@' + '764b410a09187091821300440a41364cb44dffe4',
+     Var('chromium_git') + '/android_tools.git' + '@' + '6a7921fdbc510e30de5bb38c5dcf9e524713ca6b',
 
     'src/third_party/apache-mime4j':
      Var('chromium_git') + '/chromium/deps/apache-mime4j.git' + '@' + '28cb1108bff4b6cf0a2e86ff58b3d025934ebe3a',
 
     'src/third_party/appurify-python/src':
      Var('chromium_git') + '/external/github.com/appurify/appurify-python.git' + '@' + 'ee7abd5c5ae3106f72b2a0b9d2cb55094688e867',
 
     'src/third_party/cardboard-java/src':
      Var('chromium_git') + '/external/github.com/googlesamples/cardboard-java.git' + '@' + 'e36ee57e72bbd057ddb53b127954177b50e18df7',
 
@@ skipping 367 matching lines @@
     # migration completes (let's say Sep 1 2014).
     'name': 'check_git_config',
     'pattern': '.',
     'action': [
         'python',
         'src/tools/check_git_config.py',
         '--running-as-hook',
     ],
   },
 ]