Usability improvements for Android TV and Google TV
Summary
Add a Banner and modify feature flags for Android TV devices.
Android TV devices use a so-called 'leanback' UI. This UI prefers arrow-key and voice input over touchscreen input - many Android TV devices don't even have a touchscreen. Leanback also lets us integrate into the homescreen in more ways.
The new IntentFilter in the manifest lets leanback launchers start the app in the first place, and the banner helps our app icon match the visual style.
Test Plan
We'll need to test this out on various devices. I can install on a Google TV stick and I think I have a functioning Fire TV stick here somewhere.