Not so much a bug as an enormous improvement in library size with an unknown reason. These file sizes are for the arm64 ABI of liboboe.so:

version 1.5: 2.23Mi
version 1.6: 426Ki

That's a 5.75X reduction, and afaik nothing changed on our end.

The instrumented tests all pass, so either we don't have test coverage for an area which will now fail, something changed in our build config, or something changed in the NDK.

Investigation to follow.