Clean up Gradle build warnings

[8Keep]

Cleaning up gradle build files to prepare for a new version of gradle.

Most of this is migrating to the lazy tasks apis.

[gemini-code-assist]

Code Review

This pull request modernizes the Gradle build system by migrating to the Task Configuration Avoidance API, refactoring native library handling with the Sync task, and updating dependency management across several modules. Key feedback includes concerns about potential Javadoc build failures after removing lint suppression, the inclusion of unused variables and empty tasks, and recommendations to adhere to Gradle best practices regarding lazy evaluation and logging.

[gemini-code-assist]

The variable runTask is assigned the result of tasks.register but is never used. You can register the task without assigning it to a variable.

tasks.register('run') {

[gemini-code-assist]

The mergedSource task is empty and does not appear to be used anywhere in the build scripts. It should be removed to clean up dead code.

[gemini-code-assist]

Calling .get() on a Provider (like layout.buildDirectory.file(...)) during the configuration phase is discouraged as it can break configuration caching and other lazy evaluation benefits. It is better to pass the Provider directly where possible, or only call .get() during the execution phase (e.g., inside a doFirst block or when resolving a value for an external tool like ant.get).