Force OpenGL Core Profile context on macOS

By default, SDL creates an OpenGL 2.1 context on macOS for an OpenGL
renderer. As a consequence, mipmapping is not supported.

Force to use a core profile context, to get a higher version.

Before:

    INFO: Renderer: opengl
    INFO: OpenGL version: 2.1 NVIDIA-14.0.32 355.11.11.10.10.143
    WARN: Trilinear filtering disabled (OpenGL 3.0+ or ES 2.0+ required)

After:

    INFO: Renderer: opengl
    DEBUG: Creating OpenGL Core Profile context
    INFO: OpenGL version: 4.1 NVIDIA-14.0.32 355.11.11.10.10.143
    INFO: Trilinear filtering enabled

when running with:

    scrcpy --verbosity=debug --render-driver=opengl

Note: Since SDL_CreateRenderer() causes a fallback to OpenGL 2.1, the
profile and version attributes have to be set and the context created
_after_.

PR #3895 <https://github.com/Genymobile/scrcpy/pull/3895>

Signed-off-by: Romain Vimont <rom@rom1v.com>