The implementation varies across platforms, with the same goal: allow the app to
use the entire screen real state while in a conference.
On Android we use immersive mode, which will hide the status and navigation bars.
https://developer.android.com/training/system-ui/immersive.html
On iOS the status bar is hidden, with a slide effect.
Bundle our custom icon font jitsi.ttf in the Android app (which we
already do for the iOS app).
Additionally, remove icon font files which are not in use.
As a step toward merging jitsi-meet-react with jitsi-meet to share as
much source code as possible between mobile and Web, merge the part of
jitsi-meet-react's source tree which supports mobile inside the
jitsi-meet source tree and leave jitsi-meet-react's Web support in the
source code revision history but don't have it in master anymore because
it's different from jitsi-meet's Web support. In other words, the two
projects are mechanically merged at the file level and don't really
share source code between mobile and Web.