Add contrast light and dark themes

[mkulesh]

For the record, maybe, it would be usefull

• add strong light "E-Ink (Black on White)" theme, with only black on white background (without grayscale) for E-Ink devices.
• add strong dark "Amoled (White on Black)" theme, with only white on black background (without grayscale) for Amoled devices.

[ghost]

Just for the record

• https://www.reddit.com/r/androidapps/comments/7qf3lp/does_using_an_amoled_backgrounds_in_apps_really/

[mkulesh]

Hi Symbian9, both strong light and dark themes are now available. Could you please test both temes? Do you have any E-Ink or Amoled devices in order to try these themes?

[mkulesh]

Hi Symbian9, the issue is implemented. Please test and close the issue if it is ok.

[mkulesh]

Implemented and released in 2.17.1