Revert "Move neon block to arm level for libvpx"

This reverts commit 7744504d293dc784c4de794e4eb9df25b8ff69d8.

Reason for revert: Broke several builds. I'm acting build cop, reverting.

Bug: 70351683

Change-Id: Ia57199d8ad2ad187fe9210d424fa8e566bb4452c
2 files changed