Revise method comment on setFontVariationSettings

- Update Paint's description to be the same description as TextView.
- Update example code to use more standard axes.
- Check generated reference page and fix some errors.

Bug: 37324923
Test: Checked generated reference page.

Change-Id: Ib6504df3bd149fd47f037f8d03701b2167d10e5a
2 files changed