Merge "Revert "Drop all path-related methods from android::String8"" into main am: acc7ff19f9 am: f7bb2d3871 am: 8be5de94a4

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2745822

Change-Id: I69af704b4b4589b5a4eebf2bd8f161a2b945f421
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>