Merge "floss: enforce truncate string to be at char boundary" into main am: 231c78e3

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3356389



Change-Id: I5176eeac1b34e2e4160897cb327209a844f3a825
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>