evaluate popular android phones' capabilities for WIFI distance bounding

[brenzi]

• [ ] estimate distance bounding accuracy based on timing guarantees
• [ ] assemble a list of a few phones with their Wifi chipset datasheets and distance bounding potential

[brenzi]

Treated in Noa's Thesis Report: https://encointer.org/wp-content/uploads/2019/11/Melchior2019-A-key-signing-app-for-proof-of-personhood-.pdf