Project moved to github.com/AndroidGoLab/ndk. Updated all import
paths, URLs, and references in Go files, YAML specs/overlays,
README.md, go.mod, templates, and tests. Also updates jni and
binder references to their new AndroidGoLab locations.

This is an NDK repo — all examples are NDK by definition. Remove
redundant "Library: ndk" labels and the binder battery example
(belongs in the binder project).

Combine "Usage Examples" and "Other examples" into a single
"Examples" section. Wrap all examples in <details> spoilers.
Make main examples complete programs with package/imports/main.
Use current package constants (no magic values).