SysUITests: Make TEST_OWNERS more robust

SysUI OWNERS files are littered with per-file ...=set noparent, which
if pulled in via include will break TEST_OWNERS. To work around this,
also reference TEST_OWNERS via a per-file rule.

Test: n/a
Flag: EXEMPT OWNERS_ONLY
Change-Id: I78af403c1cbe3d30b8a21dd8710b9e95e15b2996