Make logging init idempotent (swallow SetGlobalDefaultError on repeat
call), remove unused dumpLogs JNI params that violated the API contract,
and strip dead public_key_spki field + build_ec_spki() that were
computed on every keygen but never consumed by the cert builder.
EC keygen now returns proper SPKI DER instead of raw point bytes.
RSA keygen uses caller-supplied exponent via new_with_exp() and
validates key size to 2048/3072/4096. Keybox parser extracts leaf
subject DN (not issuer). Added AttestKey=7 to KeyPurpose. Realigned
error variants with spec.
Cargo.toml with 16 dependencies per build spec, error types with
From impls for all upstream error types, CertGenParams mapping the
full JNI config contract, EC/RSA key generation via ring and rsa crates.
Compiles clean for aarch64-linux-android via cargo-ndk.
Enginex0