Rename SQLite3Jni to CApi to (A) reduce name prefix collisions with incoming classes...

Rename SQLite3Jni to CApi to (A) reduce name prefix collisions with incoming classes and (B) align with its counterpart in the JS build. Remove the Canonical annotation because (A) the new code separation will inherently make that distinction and (B) the line between truly canonical and semi-canonical (e.g. differing in signature overloads) is blurry enough that consistent use of that annocation is becoming an unnecessary burden.

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