Adding the MojoShell apk in the default targets on android

shell/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/ui.gni")
 import("//mojo/public/mojo.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 # We don't support building in the component build since mojo apps are
 # inherently components.
 assert(!is_component_build)
 
 group("shell") {
   testonly = true
 
   deps = [
     ":mojo_shell",
     ":tests",
   ]
 
   if (!is_win) {
     deps += [ ":mojo_launcher" ]
   }
+
+  if (is_android) {
+    deps += [ ":mojo_shell_apk" ]
+  }
 }
 
 group("tests") {
   testonly = true
   deps = [
     ":external_application_unittests",
     ":mojo_shell_tests",
   ]
 }
 
@@ skipping 400 matching lines @@
 
     deps -= [
       ":lib",
       ":external_application_registrar_connection",
       ":external_application_registrar_bindings",
       "//shell/domain_socket",
       "//shell/domain_socket:tests",
     ]
   }
 }