Merge "Revert "Revert "Remove unused String8::setPathName.""" am: f9a9ee048c am: e9a9a4f071 am: f34b2446bb am: ecee0f136a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1771595

Change-Id: Ib1db7f5227c72c2202584e5b0d9cc4fe5d7f5a00