Updated czech translations with translated new strings

[tajnymag]

Changes

I've translated some newly added english strings to czech.

Testing

• [] Tested on a physical device
• [] Added or modified unit test cases

Connects #200

[codecov]

Codecov Report

Merging #329 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #329   +/-   ##
=======================================
  Coverage   86.79%   86.79%           
=======================================
  Files          30       30           
  Lines        1605     1605           
  Branches      178      178           
=======================================
  Hits         1393     1393           
  Misses        114      114           
  Partials       98       98           

Flag	Coverage Δ
#android	86.06% <ø> (ø)

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Impacted Files	Coverage Δ
cast-receiver/src/library.mock.ts	100.00% <0.00%> (ø)
cast-receiver/src/status_ui_handler.ts	97.43% <0.00%> (ø)
cast-receiver/src/player_manager.ts	94.18% <0.00%> (ø)

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[ashutoshgngwr]

LGTM! 👍

Thank you for your contributions.