AppIconUrl missing with certain clients

[hthgihwaymonk 34]

When using the GET /Sessions endpoint the following clients do not include an AppIconUrl.

Client = "Emby for Apple TV"
Client = "Emby for Chromecast"

tested against ` 4.8.0.37` and ` 4.8.0.43`

[Luke 42077]

Hi, thanks for reporting. We'll take a look.

[hthgihwaymonk 34]

and, if you want to throw an AppIconUrl in there for Infuse too, that would be cool