Add LanguageProvider to utils module

[jo-elimu]

Description

Add LanguageProviderUtil to the utils module, with a getLanguage() function.

Why?

To make it easier for other apps to get the language set in the Content Provider app.

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• Relates to Delete DefaultLanguageProviderImpl common-utils#34

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elimu.ai's mission is to build innovative learning software that empowers out-of-school children to teach themselves basic reading📖, writing✍🏽 and math🔢 within 6 months.

[tuancoltech]

Description

Add LanguageProviderUtil to the utils module, with a getLanguage() function.

Why?

To make it easier for other apps to get the language set in the Content Provider app.

elimu.ai's mission is to build innovative learning software that empowers out-of-school children to teach themselves basic reading📖, writing✍🏽 and math🔢 within 6 months.

@jo-elimu Maybe we should implement it in common-utils.
The code is here: https://github.com/elimu-ai/common-utils/blob/main/utils/src/main/java/ai/elimu/common/utils/di/TextToSpeechWrapper.kt at line 26.