Android support

[JulianGro]

Still a lot to do.

I got all required dependencies to build, thought not all those changes are upstreamed yet.
Dependency pull requests:

• onetbb: fix building on Clang 17+. conan-io/conan-center-index#29278
• Add initial Android support to libnode22. overte-conan-recipes#46
• Qt5 Android overte-conan-recipes#47

Known issues:

• For some reason our CMake flags don't get set. Maybe the Android toolchain gets called first, and our Conan toolchain's _INIT variables have no effect? As a workaround we add -DCMAKE_CXX_FLAGS="-falign-functions=32 -fPIC" to CMake. The Android toolchain doesn't define any CMAKE_CXX_FLAGS, so this is fine.
• shadergen.py fails. Presumably we are building the shader generator for Android, so the build computer cannot run it.
• Building without -DGL_APIENTRY=''" fails. I have no idea what is going on there: compiler_error.txt I assume I am doing something wrong when it comes to targetting/linking OpenGL, but I have no idea.

Example Conan install command:

conan install . -b missing -pr=tools/conan-profiles/android -of build

Example CMake configure command:

cmake --preset conan-release -DOVERTE_RENDERING_BACKEND:STRING=GLES -DCMAKE_CXX_FLAGS="-falign-functions=32 -fPIC -DGL_APIENTRY=''" -DHIFI_ANDROID_APP=interface