Merge "SurfaceFlinger::getNewTexture: Don't deadlock on main thread" into sc-dev

    // The pool was empty, so we need to get a new texture name directly using a

    // blocking call to the main thread

    return schedule([this] {

    auto genTextures = [this] {

               uint32_t name = 0;

               getRenderEngine().genTextures(1, &name);

               return name;

           })

            .get();

    };

    if (std::this_thread::get_id() == mMainThreadId) {

        return genTextures();

    } else {

        return schedule(genTextures).get();

    }

}

void SurfaceFlinger::deleteTextureAsync(uint32_t texture) {