Merge "floss: sysprop: Use CString for easier conversion" into main am: f0000f48

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3022226



Change-Id: I935d36ddb7c7be8581b2e9a1e8309acd746a884d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>