am 3b3e368c: am 60a20061: am 2316d626: docs: add information about using color resources as drawables

Merge commit '3b3e368c73f4224b055635e6e79f57cc702d8938'

* commit '3b3e368c73f4224b055635e6e79f57cc702d8938':
  docs: add information about using color resources as drawables