While some of the changes are due to syntax and have no effect on
the functionality, others are more important.
The major changes are
- Use Painter instead of now removed DeprecatedPainter
- Remove the need of LibArchive by using Java's native zip support
- Have a proper C++23 compiler by updating NDK to r29 beta 2
- Store user data and config in an user accessible way
- Update AGP to 8.11 and update compile target to SDK level 35
We haven't required a local copy of the ca-certificates since switching
to OpenSSL as the backend for TLS. Remove the script to download the
PEM file, and update the tests to use the system's CA certificates.