Manage horizontal and vertical size of arrow

[spvince]

Is your feature request related to a problem?

I would like to make an arrow like the picture below. But i didn't find solution. I think the size of arrow prevent.

Describe the solution you'd like:

I would like to have 2 properties :
setArrowVerticalSize(@dp value: Int)
setArrowHorizontalSize(@dp value: Int)

[vitkhudenko]

This is similar to what I discussed here - #216

[spvince]

Thanks @vitkhudenko

[alexanderfilipzik]

and here #461 :)