Update mojo sdk to rev f84766d3b6420b7cf6a113d9d65d73cb5fe18d90

mojo/android/javatests/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
   <!-- Copyright (c) 2012 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. -->
   <!-- package name must be unique so suffix with "tests" so package loader
        doesn't ignore this. -->
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:tools="http://schemas.android.com/tools"
       package="org.chromium.mojo.tests">
 
     <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
 
-    <uses-permission android:name="android.permission.INJECT_EVENTS" />
+    <uses-permission android:name="android.permission.INJECT_EVENTS"
+        tools:ignore="ProtectedPermissions"/>
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.RUN_INSTRUMENTATION" />
 
     <!-- We add an application tag here just so that we can indicate that this
          package needs to link against the android.test library, which is
          needed when building test cases. -->
     <application>
         <uses-library android:name="android.test.runner" />
     </application>
 
     <instrumentation android:name="android.test.InstrumentationTestRunner"
         android:targetPackage="org.chromium.mojo.tests"
         android:label="Tests for org.chromium.mojo"/>
 
 </manifest>