trunks, attestation, tpm_manager: update OWNERS

Removed usanghi, namnguen. Added apronin.
Added OWNERS for tpm_manager.

BUG=none
TEST=none

Change-Id: I485d996b33543d46f7fd52760c88c4a66e5fa421
Reviewed-on: https://chromium-review.googlesource.com/439626
Commit-Ready: Andrey Pronin <apronin@chromium.org>
Tested-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Darren Krahn <dkrahn@chromium.org>
3 files changed