title: Flutter AndroidManifest Error
body: <p>I just ported a project built in an earlier version of Flutter and Android studio to a new machine and updated software.  When attempting to build my Android project in the emulator, I'm getting the following error...</p>
  
  <ul>
  <li>What went wrong:
  Execution failed for task ':app:processDebugManifest'.
  
  <blockquote>
    <p>Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.4.0) from [com.android.support:appcompat-v7:25.4.0] AndroidManifest.xml:28:13-35
    is also present at [com.android.support:support-v4:26.1.0] AndroidManifest.xml:28:13-35 value=(26.1.0).
    Suggestion: add 'tools:replace="android:value"' to  element at AndroidManifest.xml:26:9-28:38 to override.</p>
  </blockquote></li>
  </ul>
  
  <p>This is what my Manifest looks like...</p>
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.yourcompany.myfavkpopflutterexample"
   xmlns:tools="http://schemas.android.com/tools"
  &gt;
  
  &lt;uses-sdk android:minSdkVersion="16" android:targetSdkVersion="21" /&gt;
  
  &lt;!-- The INTERNET permission is required for development. Specifically,
       flutter needs it to communicate with the running application
       to allow setting breakpoints, to provide hot reload, etc.
  --&gt;
  &lt;uses-permission android:name="android.permission.INTERNET"/&gt;
  
  &lt;!-- io.flutter.app.FlutterApplication is an android.app.Application that
       calls FlutterMain.startInitialization(this); in its onCreate method.
       In most cases you can leave this as-is, but you if you want to provide
       additional functionality it is fine to subclass or reimplement
       FlutterApplication and put your custom class here. --&gt;
  &lt;application android:name="io.flutter.app.FlutterApplication" android:label="myfavkpopflutter_example" android:icon="@mipmap/ic_launcher"&gt;
      &lt;activity android:name=".MainActivity"
                android:launchMode="singleTop"
                android:theme="@android:style/Theme.Black.NoTitleBar"
                android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection"
                android:hardwareAccelerated="true"
                android:windowSoftInputMode="adjustResize"&gt;
          &lt;meta-data
                  android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
                  tools:replace="android:value"
                  android:value="true" /&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN"/&gt;
              &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  &lt;/application&gt;
  </code></pre>
  
  <p></p>
  
  <p>I've added the suggested <code>tools:replace="android:value"</code> and I'm still getting same error.  I've seen similar questions that was Android Studio only.  I'm adding this to SO because I think it may be related to my Flutter build.</p>