Attempt to dynamically load sqlite symbols from the current process in Android

[marcprux]

This should work in theory in a full Android Zygote app, where sqlite is always loaded in-process in order to support various parts of the Android SDK. But it won't work in a stand-alone Swift executable (e.g., in testing) because they are not linked to the SQLite binary.

Also, there seems to be issue with resolving RTLD_DEFAULT through the Swift Android library, so we would need to figure out how to search all the locally-loaded symbols.

[marcprux]

This isn't working in practice; dlsym() isn't able to load any functions, even in a full app. This is odd, since it is in theory the exact same thing as the JNA library is doing, just from a native Swift side. More investigation is needed.