准备为ListCategoriesFragment中的CardViewNative自定义layout

从cardslib复制基础layout，这两个文件均来自cardslib的commit aafaa88d8548dec1cadbd887030a1da2b1e581f7
native_card_video_thumbnail_layout.xml是cardslib/library-core/src/main/res/layout/native_card_thumbnail_layout.xml的复本
native_card_video_thumbnail_view_layout.xml是cardslib/library-core/src/main/res/layout/native_base_thumbnail_layout.xml的复本
see https://github.com/gabrielemariotti/cardslib/tree/v.2.0.1
让ListCategoriesFragment显示解析到的“科技”各类型（genre）视频的缩略图