Google Glass and Pixel 3XL Support

[lackita]

These are the changes necessary to get things running on my particular setup. I tried to keep the tweaks fairly minimal, the primary goal to just get things up and running.

Google Glass

Google Glass' XE24 update (their final update) uses API 19, so I had to backport the minSdkVersion and make some minor tweaks to call getDrawable through the resource instead of directly.

Additionally, to navigate to the app, a glass specific intent-filter action had to be added. I believe this should just be ignored in other contexts, but somebody with a different pair of glasses will need to test this.

Pixel 3XL (Android 12)

I'm uncertain what the original intent behind the code was in isHotspotOn, but getDeclaredMethods() caused the app to crash when running on my phone. Calling the method directly, though, seemed to work fine, so I just shifted it to the more direct approach. It seemed like primarily it was just calling isWifiApEnabled, but maybe there are important use cases I'm bypassing with this approach.