Here's the way I did it. First, click on your Files tab and add the font file. I've used TTF and OTF fonts so far with no problems.
Then add something like this:
Sub Process_Globals
Dim myFont As Typeface
End Sub
In my code I used:
myFont = Typeface.LoadFromAssets("rawengulksans.otf")
lblTitle.Typeface = myFont
Just be sure to use a font to which you have the legal right to distribute, such as public domain fonts. Just check the licensing.
I've used fonts with anything with a label inside, including listviews.