[Thread] add ot-ctl to userdebug for testing

ot-ctl is a helper utility to control the ot-daemon system service for
development and testing.

This commit adds ot-ctl into /system/bin for userdebug images.

Bug: 322595971
Change-Id: Ic2440c4af14be303db637e9ab6b08785ef3b9f82