[Android] Show notification on upgrade for the Save Data stat

[SergeyZhukovsky]

Please add a notification on upgrade that alerts users to new Save Data stat.

• the notification should appear regardless of was Brave open or not on upgrade
• it should appear only once on that particular update
• it should appear only for certain locales that are listed below and the notification should be localised for them, only notification text but not an article inside.

English text is:
title: Save Data Online
text: Browse faster and block ads with Brave
URL that should be opened on notification tap: https://support.brave.com/hc/en-us/articles/360045401211
supported locales: English, French, German, Spanish, Japanese, Portuguese, Polish, Russian, Ukrainian

[srirambv]

Verification passed on Samsung Tab A with Android 9 running 1.10.98 X64 build

• Verified upon upgrade a silent notification is shown in notification area
• Verified clicking on the notification launches the browser and opens a new tab and loads https://support.brave.com/hc/en-us/articles/360045401211
• Verified notification translations done for French/Spanish/Japanese/Polish/Portuguese/Russian
• Verified for the translated notification landing page is still launched in EN and not in translated version

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Verification passed on Samsung Galaxy J3 version 5.1.1 running Bravemodernarm.apk 1.10.98

• Verified upon upgrade a silent notification is shown in notification area
• Verified clicking on the notification launches the browser and opens a new tab and loads https://support.brave.com/hc/en-us/articles/360045401211
• Verified notification translations done for French/Spanish/German/Portuguese/Japanese
• Verified for the translated notification landing page is still launched in EN and not in translated version

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Verification passed on Asus Zenfone version 6 running Bravemodernarm.apk 1.10.99

• Verified upon upgrade a silent notification is shown in notification area
• Verified clicking on the notification launches the browser and opens a new tab and loads https://support.brave.com/hc/en-us/articles/360045401211
• Verified notification translations done for French (France), German (Germany), Spanish (Spain), Japanese (Japan), Portuguese (Portugal), Polish (Poland), Ukrainian (Ukraine)
• Verified for the translated notification landing page is still launched in EN and not in translated version
• Confirmed notification is shown for the following languages: English (US), English (Can), English (Australia), English (UK), French (France), German (Germany), Spanish (Spain), Japanese (Japan), Portuguese (Portugal), Polish (Poland), Ukrainian (Ukraine)
• Confirmed notification is not shown for the following languages: Danish (Denmark), Italian (Italy)