Merge "Drop all path-related methods from android::String8" into main am: cc64ed9865 am: eb6aa6ae0f

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2724277

Change-Id: I15dfc03f1a190f5e20548e1bc2488ccac84a6f1d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>