Merge "Implement android::String access methods that avoid C string cast" into main am: 771bda6c0b am: 2b3630be4d am: 1bdf8d7af9 am: 25c2b5029f

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2748673

Change-Id: I60504b89d7ff28105f893f291b19f5376c975500
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>