[WifiTrackerLib] Do not show SUW or GMS app label in Saved Networks

Networks added by SUW or GMS should not show "Saved by..." in
the Saved Networks page. Add a resource string that specifies packages
that we should not attribution annotations (i.e. "Saved by...") for.

Bug: 191879207
Test: atest com.android.wifitrackerlib.UtilsTest, manually verify that
networks added by SUW do not show "Saved by Android Setup" anymore.

Change-Id: I6debf7e4360afcc2e113882ff3e296aadc469a2b
10 files changed