* Android: Add local copy of native_app_glue, patched to compile as C++.
* Android: List android-x86_64 configuration in makefile
* Android: Build shared-lib and examples by default
* Docs: Update Android build prerequisites
* CI: Add Android builds
* CI: **DO NOT MERGE** pick bx/PR with android support update
* Reworded & reformatted bgfx.rst for better clarity
* Reworded for clarity; made option format more consistent
* Added one character!
* Updated shaderc help
Will update docs to 100% match soon
* Updated geometryc's help
Co-authored-by: Бранимир Караџић <branimirkaradzic@gmail.com>