exclude from recents(android:excludeFromRecents in AndroidManifest.xml) must be set to true.

I am trying to submit my application for gear VR. 
using oculus validate tool it shows that everything is fine and i can upload the file but when i am doing that it says

exclude from recents(android:excludeFromRecents in AndroidManifest.xml) must be set to true.

I have already set this to true in manifest file