Upgrade project to new Android Studio template and migrate Java code to Kotlin (#3937)

### Summary
- Updated the project structure using the latest Android Studio template.
- Migrated portions of the codebase from Java to Kotlin for improved readability and maintainability.

### Details
- Refactored and reorganized files according to the new Android Studio project template to ensure compatibility with the latest project standards.
- Migrated key Java classes to Kotlin, adopting Kotlin idioms and improving type safety.
- Verified that core functionalities remain intact after migration and update.
- Removed redundant Java files and updated imports where necessary.

### Notes
- Further Kotlin migration may be needed as additional Java files are reviewed.
- Test thoroughly to confirm that all functionalities work as expected after these changes.

V2rayNG/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Jul 28 13:40:50 CST 2024
+#Thu Nov 14 12:42:51 BDT 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists