[NiLuJe]

By framework, I mean Amazon's Java UI. You can drop all the (extra) libs you want to the system, that won't make the framework magically sprouts code using them ^^.

Busybox just provides core CLI/system *nix utils. (a shell, coreutils-like tools, ...).

And, no, you can't drop binaries like that anyway. They have to match the target host (arch, kernel, libc, stdc, binutils) without ABI mismatch / symbol clashing. (In short: self-built with a proper cross-compile toolchain matching the Kindle's TC).