Update l10n (for 1.18.x release).

[mkarolin]

Download the latest l10n from Transifex.

Test plan:
Per prior @kjozwiak's instructions (#10735 (comment)):

@brave/legacy_qa should run through a few locals just to make sure that nothing obvious has regressed. Shouldn't spend too much time on this though - can be combined with testing of #12844 (see Test plan in brave/brave-core#7345).

[GeetaSarvadnya]

Verification passed on

Brave	1.18.70 Chromium: 87.0.4280.101 (ಅಧಿಕೃತವಾಗಿ ನಿರ್ಮಿಸಿ) (64-ಬಿಟ್)
ಪರಿಷ್ಕರಣೆ	9407c80213cda69c2b7abcb4fa8e3f74488f4956-refs/branch-heads/4280@{#1807}
OS	Windows 10 OS Version 1809 (Build 17763.1637)

• Verified few areas like NTP, Dashboard settings, Rewards and widgets, Shield settings, Hamburger menu items etc translation in Kannada and Hindi
• Logged Translations are missing for Brave Today settings in a non-English language  #13116
• Logged Welcome to Brave isn't not translated in non-English language #13118

Brave Rewards

NTP

Shield settings

Brave settings

---

Verification passed on

Brave	1.18.70 Chromium: 87.0.4280.101 (Official Build) (64-bit)
Revision	9407c80213cda69c2b7abcb4fa8e3f74488f4956-refs/branch-heads/4280@{#1807}
OS	Windows 7 Service Pack 1 (Build 7601.24544)

Rewards

Brave Today

Settings
Done in #12147
Logged #13121

[LaurenWags]

Verification passed on LG Nexus 5 with Android 5.1 running 1.18.70 Bravearm.apk

• Spot checked Settings, Widget, Rewards, NTP for French, German
• No obvious issues identified
• test plan from Fix missing Chromium l10n strings. brave-core#7345 not applicable to Android