Add the ability to select the language of the interface

[GrazianoCapelli]

Currently the language used by GPS Logger's interface is based on the language of the android system. Could we add a setting for the language selection, that should include all the supported languages and a "System default" item (selected by default).

[GrazianoCapelli]

Android 13 introduced a centralized location (in system settings) where users can select a preferred language for each app. To deepen the argument: https://developer.android.com/guide/topics/resources/app-languages

[GrazianoCapelli]

I am oriented to add the feature only for Android 13+, leaving the per-app language management to the system. This way we will not add any additional setting to the app, but we'll only add the code to allow the system to manage the choice of the language using the new per-app language settings.

Here the link (also published here above) that describes how to implement it: https://developer.android.com/guide/topics/resources/app-languages

[GrazianoCapelli]

We'll wait a good diffusion of Android 13 to implement the feature. I remove this feature from the v3.2.0 milestone.