Move rules for building Android Mojo services to //mojo/android

examples/java_android/echo/BUILD.gn

 # 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.
 
 import("//mojo/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
-import("//services/android/rules.gni")
+import("//mojo/android/rules.gni")
 
 group("echo") {
   deps = [
     ":java_echo_client",
     ":java_echo_server",
   ]
 }
 
 mojo_android_java_application("java_echo_client") {
   sources = [
@@ skipping 15 matching lines @@
   ]
 
   mojo_main = "org.chromium.examples.java_echo.EchoServerApp"
 
   deps = [
     "//examples/echo:bindings_java",
     "//mojo/public/interfaces/application:application_java",
     "//mojo/public/java:application",
   ]
 }