ndk: Add bindings for AFont

[paxbun]

This PR provides bindings for AFont, AFontMatcher, and ASystemFontIterator and some helper structs for the better abstraction of some parts of the OpenType specification.

Example:

for font in ndk::font::SystemFontIterator::new().unwrap() {
  log::debug!("Font: {}", font.path().display());
  for idx in 0..font.axis_count() {
    log::debug!("  Axis {idx} ({}): {}", font.axis_tag_at(idx), font.axis_value_at(idx));
  }
  log::debug!("  Collection Idx: {}", font.collection_index());
  log::debug!("  Locale: {:?}", font.locale());
  log::debug!("  Weight: {}", font.weight());
  log::debug!("  Is Italic: {}", font.is_italic());
}

Result (Tested on Galaxy Tab S8):

[paxbun]

TODOs

• Reflect PR number to CHANGELOG.md
• Reflect NDK version (I used 25.1.8937393) to CHANGELOG.md and Cargo.toml or re-generate ndk-sys bindings

[MarijnS95]

Nice! I'll pull in the bindings regeneration via #370, and then have a look at this.

[MarijnS95]

@paxbun any updates or should I apply the remaining comments/remarks/suggestions and merge this? I'd like to get the "breaking" changes imposed by the ndk-sys regen in and publish all these crates soon-ish™.

[paxbun]

@MarijnS95 I think I mostly applied your suggestion, and I also checked whether there are any ffi::* functions not wrapped. I also added constructors that constly panic to AxisTag.

[MarijnS95]

Note that I reported the header issues at android/ndk#1920, because surface_control.h (which I need and am writing a wrapper for) has the same (and many more C++-like) issues.

Hopefully we can drop the workarounds when upstream picks them up.

[MarijnS95]

Marked most of the conversations as resolved, nice job clearing it all up!

I only have nits now, and if you fix the conflicts to make the CI run it might have a complaint or two, but after that I'll merge this in!

[paxbun]

I applied all the suggestions you mentioned! (except for the axis tag one)