feat(keyboard): feature phone buttons (#4694)
feat(keyboard): feature phone buttons (#4694)

I got a KaiOS phone with some awesome buttons on it I hadn't seen before on the web. This adds the following buttons to our default keyboard layout:

`SoftLeft`
`SoftRight`
`Camera`
`Call`
`EndCall`
`VolumeUp`
`VolumeDown`


GoogleChrome/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,GoogleChrome/puppeteer,puppeteer/puppeteer,GoogleChrome/puppeteer