Left Alone

Added

• "Left Alone" and "Waiting for other participants" UI. Now when the user remains alone in the room a message is displayed on screen.
• File logger. Now it is possible to store log messages in a log file located inside the Cache directory of the app. The log file size can be as big as 5MB. This logger is an opt-in logger, by default it is turned off.

Fixed

• A bug preventing outgoing calls from being displayed in Picture in Picture when the presentation mode was "PiP"
• A bug leading to camera preview being rotated when the call was started with the device in "Face up" orientation