Earpiece follow up: Change labels and icons (#3401)

* fix collapse icon on android

* update wording `earpiece` -> `headset`

* update icon `earpiece` -> `phone`

* i18n

* update icons to solid (top right) and non solid (overlay)

* update snapshots

* add config.json to gitignore

* add offset for earpice overlay

* update snapshots to include offset spacer

.gitignore

@@ -9,6 +9,7 @@ dist-ssr
 public/config.json
 backend/synapse_tmp/*
 /coverage
+config.json
 
 # Yarn
 yarn-error.log