Finding the “Android class name” in “AndroidManifest.xml” generated by Unity3D

When configuring a "Android Native App" in a Facebook app, they require the Android Class Name. If you created the Android APK from Unity3D, how do you know what class to use?

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="preferExternal" package="--------------" android:versionName="1.02" android:versionCode="8">
   <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
   <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="true">
     <activity android:name="com.unity3d.player.UnityPlayerProxyActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:screenOrientation="landscape">
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
       </intent-filter>
     </activity>
     <activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:screenOrientation="landscape">
     </activity>
     <activity android:name="com.unity3d.player.UnityPlayerNativeActivity" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:screenOrientation="landscape">
       <meta-data android:name="android.app.lib_name" android:value="unity" />
       <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" />
     </activity>
     <activity android:name="com.unity3d.player.VideoPlayer" android:label="@string/app_name" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:screenOrientation="landscape">
     </activity>
     <!-- ACTIVITIES -->
     <activity android:name="com.prime31.FacebookProxyActivity" />
     <!-- META-DATA -->
   </application>
   <!-- PERMISSIONS -->
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-feature android:glEsVersion="0x00020000" />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   <uses-feature android:name="android.hardware.sensor.accelerometer" />
   <uses-feature android:name="android.hardware.touchscreen" />
   <uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" />
   <uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="false" />
   <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" />
 </manifest>