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java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__atomic_store_4"
That means you're probably using Clang rather than GCC, which may explain the problem. It probably needs a more fine-grained `ifdef` [here][1].

Try removing the `ifdef` half of that in your local copy, rebuilding it to use the `else` version. If that works, then you may be able to suggest a modification to the condition that will make Clang take the "else" path on NDK20.

[1]: https://sqlite.org/src/info?udc=1&ln=196&name=5483382f76b15c3d