Reproduction steps:
1) Download and open "PermissionOnCardboard.zip" project
2) Build and run "Default" scene on Android device with Android version 6.0 and newer
-- Notice that app doesn't show any permission request
3) When application fully loads press "Settings" button (right top corner, gear icon)
-- Notice that permission request window pops up

Expected result:
Permission window should appear as soon as app is launched

Reproduced with:
5.6.0b1, 5.6.0f3, 2017.1.0b1

DUT:
Google Nexus 5x, Android 7.1
Samsung S6 Edge, Android 6.0

Unable to reproduce with:
LG G3, Android 5.0 (expected as there's no such window)