Inject annotations before running ProGuard

[Noisyfox]

This allows us to remove protocol interface methods in ProGuard, thus reduce the build time & binary size.

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Currently we need to keep those interface methods in ProGuard because we need the @Selector annotations from those interface methods. However we actually do not use those annotations from interface methods directly, but use the one defined in the concrete class methods, which we copied the annotation from interface in class validator. So if we copy those annotations before running ProGuard, then we are allowed to remove those interface methods later.

[Berstanio]

https://github.com/multi-os-engine/moe-plugin-gradle/blob/fe4e25983e57272a7f6efca221326763d01a03bb/src/main/java/org/moe/gradle/tasks/ProGuard.java#L146-L150

In gradle 7 the internal annotation cannot be combined with the input annotation. Probably the input annotation is wrong here?

[Noisyfox]

You're right, the internal annotation should be removed.