[Gear VR / UE4] Submission validator errors and warnings clarification (how to fix?)

[motorsep]

I ran validator over my apk and got these:

Errors:

 --> APK is launchable (launchable-activity)

 --> Intent Filter Category attribute (application/activity/intent-filter/category) must be INFO in manifest

Warnings:

 --> GLES version is (not specified) (uses-gl-es)

How do I fix those ?

P.S. Using UE 4.12.5 / UE 4.13.p2

Thanks beforehand