Replace jcenter() with mavenCentral() in build.gradle

[antonlicht]

This pull request updates the Gradle build configuration to improve repository management and future compatibility. The main change is replacing the deprecated jcenter() repository with mavenCentral() in both the main and example Android build files.

Repository updates:

• Replaced jcenter() with mavenCentral() in the buildscript.repositories section of android/build.gradle to use a more reliable and supported repository.
• Replaced jcenter() with mavenCentral() in the rootProject.allprojects.repositories section of android/build.gradle for consistency across all projects.
• Updated buildscript.repositories in example/android/build.gradle to use mavenCentral() instead of jcenter().
• Updated allprojects.repositories in example/android/build.gradle to use mavenCentral() instead of jcenter().

[Nana-Kwame-bot]

When is this getting merged?

[MaxEliezerSingular]

Hi @antonlicht, @Nana-Kwame-bot,
Thanks for this PR. We are currently reviewing the changes and will work on merging ASAP.

We really appreciate the clean contribution! If you’ve noticed any other areas for improvement, please feel free to suggest them or contribute more code.

[bynikoala]

Hey there. This is still open and blocking us from migrating to new AGP versions. It has been quite some time now.