Simply Replace libchrome StringToXXs with android base ones am: 3357e27882 am: a8911f056d

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/3310800

Change-Id: I78eafbb1dd1a1b45d71ea2495c15f618e4f3a457
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>