Back out "Add package for projects/integrations/Unity (multiple)"

Summary:
Original commit changeset: 6604faeec6bc

Original Phabricator Diff: D86437831

Reviewed By: AlexThiv

Differential Revision: D86558771

fbshipit-source-id: 9b94a94d15218e1a7a0658e6b7746244321d1298

Author: NavidQar

Assets/Plugins/Android/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8" standalone="no"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="auto" package="com.meta.unity-startersamples">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="auto">
   <application android:label="@string/app_name" android:icon="@mipmap/app_icon" android:allowBackup="false">
     <activity android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" android:configChanges="locale|fontScale|keyboard|keyboardHidden|mcc|mnc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|touchscreen|uiMode" android:launchMode="singleTask" android:name="com.unity3d.player.UnityPlayerActivity" android:excludeFromRecents="true" android:exported="true">
       <intent-filter>