[#1099]Add Support for Greek language

[Xi-Zhang1]

Description

Add Support for Greek language.

Change Summary Added a new folder values-el to house the Greek language files. Introduced arrays.xml and strings.xml files within the values-el folder, containing the necessary translations for the Greek language support.

Fixes #1099

Type of change

Just put an x in the [] which are valid.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• [x] ./gradlew assembleDebug assembleRelease
• [x] ./gradlew checkstyle

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings

[codeclimate[bot]]

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