Extend connectivity OWNERS

Also remove 'build.master@android.com' which is deprecated, not
declared by anybody else, and makes the linter unhappy.

Bug: 70394432
Test: built
Merged-In: I9c0ba41386129379f82259fcc5e745562b014fae

(cherry pick from commit 626eed2a)

Change-Id: Ie802113d61f693d73f7234b44ac2a9bd462b3fbf