Merge "Drop String8::std_string" into main am: 9cbae9d75b am: 5e890d37e9 am: afcf339b0b am: d7fedd077b

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

Change-Id: Ic512ec154d10c75ce1f378275fe9120b0a4a1856
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>