Fit image in the screen width. Don't stretch small, don't extend large beyond screen size.

[tomekit]

What initialScale to use to make this library work for images with width smaller than the screen size and images with width larger than the screen?

If initialScale is set to: PhotoViewComputedScale.contained, large images are contained, but small images are stretched like here: #306 (comment)

If initialScale is set to 1.0. then small images have original size (they're not stretched), however large images are already in zooming mode.

This issue is clearly visible if this library example is used.

Initially opened with stretch:

If zoomed out, looks correct (I would like this to be starting point)