This is a common problem with older binaries (native libs = so-files such as "libspeex.so" in your case). Google added some checks some time ago and now requires that said binaries are recompiled to adhere to their requirements. This happened to many libs using non-adhering binaries.
The solutions are either targeting a lower SDK-version (which is probably not going to resolve your problems since Google will soon require that apps are set to targetSdkVersion to 26+) or the binary/library (not the wrapper) is being recompiled to adhere to the new requisites. I don't think
@warwound could do anything about it even he wanted to unless the code for compiling the binary is ready-available. If you are lucky, the author of the library, that was wrapped by
@warwound, may have recompiled the sources and then the library could be re-wrapped including the updated binaries.
Edit: a long shot: If the author did recompile the binaries, then get hold of them and if you are lucky you could unzip the wrapper and replace the binaries and then zip-compress it again although most of the times this approach will fail....