Roll android_tools.

This picks up one new change:
 - "Don't track platform.xml"

Review URL: https://codereview.chromium.org/406013002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284487 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -512,7 +512,7 @@ deps_os = {
   "android": {
     "src/third_party/android_tools":
       Var("chromium_git") + "/android_tools.git" +
-      "@e91e44dc29517115794a72eea554616d067925ae",
+      "@8301b711a9ac7de56e9a9ff3dee0b2ebfc9a380f",
 
     "src/third_party/aosp":
       "/trunk/deps/third_party/aosp@148330",