Avoid char[] allocation for new String(byte[], ISO_8859_1) am: 15294fe689 am: 388ca8ea9d am: d164d10708

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

Change-Id: I6abb3c7b6827b4316044838deca50ab0a210842d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>