title: Application Tag in manifest show me [App is not indexable by Google Search; consider adding at least one Activity with an ACTION-VIEW intent filter]
body: <p>i'm trying to add notification service in my application after add same line like <code>service</code> in <code>manifest</code>  .... Tag  <code>Application</code> show me this messegs i don't have any idea what suppose to mean this messege , </p>
  
  <p><a href="https://i.stack.imgur.com/LnMq8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LnMq8.png" alt="enter image description here"></a></p>
  
  <pre><code>  &lt;?xml version="1.0" encoding="utf-8"?&gt;
    &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ddd"&gt;
    &lt;uses-permission android:name="android.permission.INTERNET" /&gt;
    &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt;
    &lt;application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:supportsRtl="true"
      android:theme="@style/AppTheme"&gt;
      &lt;meta-data
        android:name="com.google.firebase.messaging.default_notification_icon"
          android:resource="@mipmap/animal" /&gt;
      &lt;meta-data
       android:name="com.google.firebase.messaging.default_notification_color"
          android:resource="@color/colorPrimary" /&gt;
      &lt;activity
          android:name=".Splashscreen"
          android:configChanges="orientation|screenSize"
          android:screenOrientation="portrait"
          android:windowSoftInputMode="adjustResize"
          android:label="@string/app_name"
       android:theme="@android:style/Theme.Holo.Light.NoActionBar.Fullscreen"&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;activity
          android:configChanges="orientation|screenSize"
          android:screenOrientation="portrait"
          android:windowSoftInputMode="adjustResize"
          android:name=".MainActivity"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN" /&gt;
              &lt;category android:name="android.intent.category.DEFAULT" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
      &lt;service
          android:name=".MyFirebaseMessagingService"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.google.firebase.MESSAGING_EVENT"/&gt;
          &lt;/intent-filter&gt;
      &lt;/service&gt;
    &lt;/application&gt;
    &lt;/manifest&gt;
  </code></pre>