SSRestarDetector: modify the SELinux policy to allow access files owned by system for Whitechapel.

It needs to access a file pushed by hosts of test suites (details: http://go/pd-client-for-lab#heading=h.wtp07hbqvwgx)

Bug: 234359369
Design: http://go/pd-client-for-lab
Test: manual (http://b/271555983#comment3)
Change-Id: I1c9544ca2ebe1857c439f00c4589f739aca8e157
1 file changed