Do not use android specific API in mojo/java.

mojo/java/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/rules.gni")
 
 android_library("java") {
-  java_files = [ "org/chromium/mojo/common/DataPipeUtils.java" ]
+  java_files = [ "src/org/chromium/mojo/common/DataPipeUtils.java" ]
 
   deps = [
     "//base:base_java",
     "//mojo/public/java:system",
   ]
 }