Merge "Revert "Remove unused String8::setPathName."" am: 615bf4ef14 am: 01f3306b69 am: 2cca5cc992 am: 6fd9460002

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1768145

Change-Id: Ia8c79e5a81b73b7d785b3bb14d7afe33efc3cdb1