Put v4l2_codec2 underneath a soong namespace am: f83441a3c9 am: ae52ea56b2

Original change: https://android-review.googlesource.com/c/platform/external/v4l2_codec2/+/1928162

Change-Id: Iad6ef4c0c55293748f9b1fed9c4a0d61be31f20d