Merge "Implement android::String access methods that avoid C string cast" into main am: 771bda6c0b

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

Change-Id: I8465ee304ef29af2104744ff7af5c713864246af
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>