arvr/projects/fluid - replace "com.samsung.android.vr.application.mode" in manifest xml files

Summary:
The [post](https://fb.workplace.com/groups/oculusplatformsdk/permalink/1303649500796461/) explains why we are doing the change.

The transformation rules below come from the [PackageHelpers.java](https://www.internalfb.com/code/fbsource/[beda88384dad]/arvr/apps/SystemShell/Common/PackageUtils/java/com/oculus/common/packageutils/PackageHelpers.java?lines=671-682) file:
* Removing from application.meta-data means adding category in every application.activity, in every child intent-filter
* Removing from activity.meta-data means adding category in current activity, in every child intent-filter

Reviewed By: krakendono

Differential Revision: D68752018

fbshipit-source-id: 89c3992d4cbbd01a6b07c24a2438eea4ad9c1d79

Author: Gustavo Armenta

Assets/Plugins/Android/AndroidManifest.xml

@@ -10,7 +10,6 @@
       <meta-data android:name="com.oculus.vr.focusaware" android:value="true" />
     </activity>
     <meta-data android:name="unityplayer.SkipPermissionsDialog" android:value="false" />
-    <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_only" />
     <meta-data android:name="com.oculus.ossplash.background" android:value="black" />
     <meta-data android:name="com.oculus.telemetry.project_guid" android:value="000765a6-61ec-4df2-89a9-853394e6fbc8" />
     <meta-data android:name="com.oculus.supportedDevices" android:value="quest|quest2|questpro|quest3|quest3s" />