Simplify acp

[kageiit]

• Remove unnecessary configuration and convention
• Move most configuration to extension
• Provide support to get android dependencies from any 'provided' like plugin
• When depending on project dependencies in apt configuration, also need to add a dependency on the acp configuration. This is not required once the compiler jar is packaged

[ZacSweers]

So to confirm, only the annotation processing library itself needs to specify the config but consumers of that processor later don't?

[kageiit]

So to confirm, only the annotation processing library itself needs to specify the config but consumers of that processor later don't?

Correct. Consumers do not even know that acp was used. This approach is api-invisible

[ZacSweers]

Ignoring CI for now because I'll fix that later

[ZacSweers]

Thanks!