Replace android-properties with android_system_properties.

[nical]

Fixes #2805.

Description

android-properties use statically linked Android libc symbols while android_system_properties loads them dynamically. This is required to support old and new versions of Android with the same binary. It unblocks updating wgpu in Gecko.

In its current version, android_system_properties supports exactly what wgpu needs and nothing more, which makes it easy to audit, don't hesitate to give it a critical look: https://github.com/nical/android_system_properties/blob/00c55a5a871e3fc6d9b133f96bf6d74c8e1927cf/src/lib.rs and report concerns here or in an issue on the repo.

I heared back from the android-properties crate author yet in my PR their repo and I can't afford to wait for too long as this blocks a lot of work on the Firefox side. So I ended up putting together an alternative crate (the PR was already pretty much an entire rewrite). I'll be happy to move wgpu back to android_properties if/when things can be resolved there (and yank the whole android_system_properties crate.

Testing

I tested it manually on a device, however it is a bit hard to automate. This doesn't change the test coverage as far as wgpu is concerned.

[cwfitzgerald]

Sounds good, keep us updated when upstream changes!