Fix VulkanDriver query for the DEPTH24 format.
Fix VulkanDriver query for the DEPTH24 format.

This fixes one of the bugs seen with `gltf-bloom` on Android.

We already dynamically map Filament's DEPTH24 format to either
VK_FORMAT_D32_SFLOAT or VK_FORMAT_X8_D24_UNORM_PACK32, depending on
the platform. Therefore we should return `true` when asked if the
backend supports DEPTH24. Otherwise the client will not be able to
create a depth texture.

google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament