Retrieve system language on Android

[BrettDong]

Summary

I18N "Retrieve system language on Android"

Purpose of change

Android version does not read system language, so the game is in English no matter what language the Android system is. The player has to go to the options menu and manually select the language they recognise. It is observed that this is a hurdle for players who have zero knowledge of English.

Describe the solution

• Probe system language in the Java side
• Read system language in the C++ side through JNI

Testing

arm64 apk built by GitHub Action: https://github.com/BrettDong/Cataclysm-DDA/releases/tag/SystemLanguage

• Tested on Huawei EMUI 9.1, Android 9:

System Language	System Country/Region	Detected Language Code	Mapped Game Language
Simplified Chinese	China	zh_Hans_CN	zh_CN
Traditional Chinese	Hong Kong SAR	zh_Hant_HK	zh_TW
Traditional Chinese	Taiwan	zh_Hant_TW	zh_TW
Japanese	Japan	ja_JP	ja
French	Canada	fr_CA	fr
English	Canada	en_CA	en

• Tested on Xiaomi MIUI 12, Android 10:

System Language	System Country/Region	Detected Language Code	Mapped Game Language
Simplified Chinese	China	zh_CN	zh_CN

• Tested on Xiaomi 10 Pro, MIUI 12, Android 11:

System Language	System Country/Region	Detected Language Code	Mapped Game Language
Simplified Chinese	China	zh_CN	zh_CN

[actual-nh]

Suggestion: for Travis, move android to the first stage. Let me know if you'd like me to put in a PR to your branch for this.

EDIT: The heart above, BTW, is for the poor players on Android with no knowledge of English (my spouse is not a native English speaker, which helps make me aware of what a difficult language it is to learn).

[ZhilkinSerg]

https://www.dropbox.com/s/z2bp4tmey7js9t7/cataclysmdda-0.YYY-experimental-arm64-v8a-release.apk?dl=0 - 64 bit
https://www.dropbox.com/s/wg4zh7j1z6inbnk/cataclysmdda-0.YYY-experimental-armeabi-v7a-release.apk?dl=0 - 32 bit

[ZhilkinSerg]

When game "Language" option is set to "System Language" debug.log says:

• Desktop version - Language is set to: 'ru';
• Mobile version - Language is set to: 'ru_RU'.

Mobile version did not switch language to Russian automatically.

[BrettDong]

The latest commit 1388c05 should be working now.

[ZhilkinSerg]

Yes, seems to be working. Tested in a couple of languages - game language is changed automatically when set to "System language". Links with APK for testing are above.

[BrettDong]

I feel this version is ready for merge.