Use CopyOnWrite ControlListingController callbacks

Otherwise when dumping the controller there is a risk of
ConcurrentModificationException

Flag: EXEMPT This is a minor bug fix.
Fixes: 356752728
Test: atest ControlsListingControllerImplTest
Change-Id: I98d06fbb9c2cdb074a3597b1030a2aec75d8df35

Change-Id: If129d345a24f9f76f8d5946701c80bd7215efbe4
2 files changed