Adds play-pause toggle menu item to MainActivity

[ashutoshgngwr]

Testing

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

[codecov]

Codecov Report

Merging #198 into master will increase coverage by 1.54%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master     #198      +/-   ##
==========================================
+ Coverage   85.88%   87.42%   +1.54%     
==========================================
  Files          19       22       +3     
  Lines        1020     1177     +157     
  Branches      101      135      +34     
==========================================
+ Hits          876     1029     +153     
- Misses         73       75       +2     
- Partials       71       73       +2     

Flag	Coverage Δ
#android	86.07% <85.71%> (+0.18%)	⬆️
#cast_receiver	97.79% <ø> (?)
#ui_tests	61.73% <85.71%> (+0.89%)	⬆️
#unit_tests	46.09% <0.00%> (+6.01%)	⬆️

Impacted Files	Coverage Δ
...ava/com/github/ashutoshgngwr/noice/MainActivity.kt	77.50% <85.71%> (+1.74%)	⬆️
cast-receiver/src/player_manager.ts	97.59% <0.00%> (ø)
cast-receiver/src/status_ui_handler.ts	98.03% <0.00%> (ø)
cast-receiver/src/library.mock.js	100.00% <0.00%> (ø)
...hub/ashutoshgngwr/noice/fragment/DialogFragment.kt	81.66% <0.00%> (+3.33%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 275d660...72ef629. Read the comment docs.