Update in Brazilian Portuguese translations

[lucastsantos]

Changes

This PR adds translations for missing items. I also took the liberty to change some terms that was already translated to terms that are commonly used by other apps.

Those are:

• Library: "Biblioteca" alone is commonly used by many music players, so I felt that there's no need to provide more details for the user
• Sleep timer: "Temporizador" (pt-br) or just "Timer" (english word, but a known word to brazilians nowadays) is commonly used by music players to provide this same feature. I've aligned with the spanish translation to keep as Temporizador.

Testing

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

Others

• Connects Need translators for app localization #200

[codecov]

Codecov Report

Merging #381 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #381   +/-   ##
=======================================
  Coverage   86.96%   86.96%           
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  Files          30       30           
  Lines        1626     1626           
  Branches      178      178           
=======================================
  Hits         1414     1414           
  Misses        114      114           
  Partials       98       98           

Flag	Coverage Δ
#android	86.25% <ø> (ø)

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[ashutoshgngwr]

LGTM! Thank you, this is great work!

[ashutoshgngwr]

@lucastsantos I forgot to mention. Can you please also update Fastlane metadata for pt-BR? I think it is also outdated.

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And also your name to Translation credits. :)

[lucastsantos]

Thanks, glad to help!
Sure, i'll take a look at it and add the credits aswell