Help prevent OOM while running SystemUI tests on cuttlefish.

Don't setup (choose) a FalsingManager implementation every time that
DeviceConfig.OnPropertiesChangedListener fires.

Bug: 139860714
Test: run `atest frameworks/base/packages/SystemUI/tests/` on cuttlefish, verify no OOM
Change-Id: I80408c4f9097f74b8170e7be478229b4538ef0a5
1 file changed