Fix PermissionGranter on weird phones

As @crgarridos explains at #108, PermissionGranter was clicking on the refuse button on some phones like the Lenovo TB3-850M and the Moto G2 2014. And he fixed it at #110. Big thanks!

In addition, #111 improves the message that appears when running Barista's tests on phones without the runtime permissions system, to help Barista's developers. Let's make our work easier!