Allow any app to show panel, based on flag

Eventually, we'll add a flow for the user to opt in to these extra apps.
For now, just allow all of them.

These flag should not be released without the flow in place.

Test: atest ControlsListingControllerImplTest
Bug: 261990872
Change-Id: I6b52305106d5b0f6a56ac72827a93e7fcde5a7fb