Merge "Move libvpx/* to *" am: 6cfc15bc29

Original change: https://android-review.googlesource.com/c/platform/external/libvpx/+/2276788

Change-Id: Ie123d47a29f1383d61daa7ffa125741fd391fb0a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>