Adding rendering of hiking trails marked in black (tags: osmc: symbol: black: white: black_bar)

In Poland, marking hiking trails are available in five standard colors: red, green, yellow, blue and black.

OsmAnd in the current version 1.5.2 renders only four colors: red, green, yellow and blue. There is no rendering trails in black.

I would like to ask for the rendering for the following combination of tags: osmc: symbol: black: white: black_bar.

See also:
https://github.com/osmandapp/OsmAnd-resources/pull/59
https://github.com/osmandapp/OsmAnd-resources/pull/62