Merge "libutils: add unit tests for invalid utf-8 and utf-16 strings" am: eb85221dcf am: c21e63ea26 am: ddc33e4f85 am: cc2f1917ac

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1470423

Change-Id: Ie9f981fb869868a3acc2ca60e1a1a727b0905ad5