[Android] Port l10n from master with c81 update

[SergeyZhukovsky]

We miss translation for certain languages in 1.5.x and 1.7.x and need to update them from master

Description

Steps to reproduce

1. Switch your device language to Japanese.
2. Open a Brave Rewards panel

Actual result

Expected result

Messages should be translated

Issue reproduces how often

always

Issue happens on

• Current Play Store version?
• Beta build?

Device details

• Install type (ARM, x86):
• Device (Phone, Tablet, Phablet):
• Android version:

Brave version

Website problems only

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrolikeme?

Additional information

[SergeyZhukovsky]

done brave/brave-core#5104 brave/brave-core#5105

[srirambv]

• Verification passed on OnePlus 6T with Android 10 running 1.7.102 x64 build
  
  
  
  
  
  

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• Verification passed on Samsung Tab A with Android 9 running 1.7.102 x64 stable build