Fixed day night theme issue

[sergchil]

When using day night theme, due to application context background color was not picking the right resource for example when using night mode background resource should use values-night, but was using values

[kpmmmurphy]

Hey @sergchil, many thanks for this PR, and apologies for the delay in response. This looks good, before merging, could you please bump the library's version number, and update the changelog. Thanks again