This changes lets us use the latest UI design from Google, Material 3.
Google only provides the material UI 3 themes for compose, compose only works with kotlin.
We're not interested in the *.class files, we run javac only to
generate the JNI header. By using @PRIVATE_DIR@, it gets stored to a
directory we can ignore, and not into the source tree.
Most of the Android specific meson code has been removed and replaced with
the grade build system.
The new meson build scripts build and move the libmpd.so binaries into the correct
location that gradle expects. After than gradle handles building the rest of the Android app.
Icons and banners have been updated for the modern app packaging expectations.
For reference here was the figma template Google provides that I used to back the png versions
for older versions of Android <https://www.figma.com/community/file/1283953738855070149>
Boost makes building a piece of software much more difficult than
necessary. It's a huge library, and just uncompressing it takes a
considerable amount of time. MPD only used a tiny fraction of it, yet
its header bloat made the MPD build very slow. Locating Boost was
difficult due to its arcane build system and its resistance to use
pkg-config; it's always a special case. MPD could never use features
of newer Boost versions because Linux distributions always shipped old
Boost versions. Boost made everything complicated and slow.
So, finally, after getting rid of GLib (commit ccdb94b06c), switching
to C++ and using Boost (commit 0801b3f495), we've finally get rid of
it 8 years later.
Unfortunately, I had to reimplement parts of it along the way
(e.g. IntrusiveList). Kind of NIH, but on the other hand, compiling
MPD has become much easier for users.
This script setup a dummy android native app folder and call ndk-gdb from it.
It needs a modification in ANDROID_NDK since ndk-gdb may attach to the wrong
pid, cf. comments in the script.
