Keep the screen on during call.
Fixes NPE when sound effects are supported, but implementation returns null for other reasons.
Allows to configure captured video size.
Adds smiley replacement.
Adds settings for smiley replacement.
Adds shorter text labels for the switches.
Extracts from VideoCallActivity video related code parts to the fragment .
Adds the possibility to change used camera during the call.
Unregisters proximity sensor listener in onPause event to make sure that it's active only when Activity is visible.