Avoid char[] allocation for new String(byte[], ISO_8859_1) am: 15294fe689

Original change: https://android-review.googlesource.com/c/platform/art/+/2234648

Change-Id: Ief91296fb02d80d9847e704b47c0bb15376913c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>