Grant ownership of device things to reillyg

BUG=None
NOTRY=True
TBR=rpaquay@chromium.org

Review URL: https://codereview.chromium.org/557123003

Cr-Commit-Position: refs/heads/master@{#294073}

device/OWNERS

 keybuk@chromium.org
 gdk@chromium.org
 miket@chromium.org
+reillyg@chromium.org
 rockot@chromium.org
 rpaquay@chromium.org

extensions/browser/api/hid/OWNERS

+reillyg@chromium.org
 rockot@chromium.org
 rpaquay@chromium.org

extensions/browser/api/serial/OWNERS

 ikarienator@chromium.org
 miket@chromium.org
+reillyg@chromium.org
 rockot@chromium.org
 rpaquay@chromium.org

extensions/browser/api/usb/OWNERS

 # USB API members. For core API change, check with owners in
 # chrome/browser/extensions/OWNERS
+reillyg@chromium.org
 rockot@chromium.org
 rpaquay@chromium.org

extensions/browser/api/usb_private/OWNERS

+reillyg@chromium.org