GN: enable Vulkan on Android when API >= 24.
Android API >= 24 implies Vulkan support, so we can have a more useful default here than 'false'. If for some reason you wanted to turn it off, you can still override skia_use_vulkan.
The defined(ndk_api) guards other users of our GN files (Fuchsia) who may not have an ndk_api argument defined in their BUILDCONFIG.gn.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2347843003
Review-Url: https://codereview.chromium.org/2347843003
3 files changed