Merge "Drop String8::std_string" into main am: 9cbae9d75b

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2745821

Change-Id: I8d820356619fe8067c892586087e7d3263b9e8f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>