title: is it support the jpeg picture deal with GL_TEXTURE_EXTERNAL_OES mode likes deal with video
body: <p>For saving memory and improving performance，I want to use a special format texture to deal with jpeg picture. The format handles by GL_TEXTURE_EXTERNAL_OES but process is same to GL_TEXTURE_2D (only different from glBindTexture and shader program texture declaration)
    I have done it in egl hardware mode('rasterizer_type': 'direct-gles'). But have problems when I use skia hardware mode ('rasterizer_type': 'hardware'), I found skia hardware mode don`t support it directly  and will call render_image_fallback_function_ (HardwareRasterizer::Impl::RenderTextureEGL) to deal with it likes 360 video. I found the result for display is very different from it show in egl hardware mode, It seems that the way only use to deal with 360 video. Is there a way to possible I let skia hardware mode support the special format directly or I only add a new way in TexturedMeshRenderer to deal with picture to distinguish 360 video.</p>