native: update from upstream

Followed instructions from go/nnapi-dep-instructions.

Delete other OWNERS files to fix CQ

$ git merge cros/upstream/master --no-ff
$ repo upload --cbr . --no-verify

BUG=b:197814725
TEST=FEATURES=test emerge-amd64-generic nnapi aosp-frameworks-ml-nn

Exempt-From-Owner-Approval: This is a forked repo
Change-Id: Id02fdc79b5b12d3abc6048cac40430c06ad30e28