Added icon for google sleep plugin

[this-Aditya]

Updated the icon or google sleep plugin.

[this-Aditya]

[blootsvoets]

LGTM. Perhaps this would be a good generalization to add to the provider
fun imageResource(state: T?): Int
where each provider can implement their own image resource. For most devices that would be battery, but for others it can be just an icon.

[this-Aditya]

Sure, thanks! I will update the Provider class soon.

[yatharthranjan]

Is this superseded by #135 ?

[this-Aditya]

Hi, it doesn't. The supporting PR for #135 -> RADAR-base/radar-commons-android#437 was closed because it was not working for every plugin.

[yatharthranjan]

Ok in that case, do we need to add more cases here for the other google plugins?

[this-Aditya]

As Joris suggested, it would be nice if generalized via radar-commons-android, and then each plugin can update its icon itself. Is it okay if I try to make it work in another PR again?

[yatharthranjan]

ok, that would be great, thanks.

[this-Aditya]

Added new PR here -> #141.