MediaTek has announced the Dimensity 9200, a flagship-styled smartphone chip that you’re not buying now — but that the company hopes will eventually become as popular as others sold within phones in the United States. If you’re a fan of Chinese smartphones made by Oppo, Vivo, Xiaomi, and their competitors, chances are that you own a smartphone with a MediaTek Dimensity smartphone chip powering it. But the United States, sales are dominated by Apple’s self-made iPhones, which compete with Samsung’s Galaxy lineup and the Snapdragon chips from Qualcomm. Both make it difficult for MediaTek to gain…