Fix NullPointerException in ControlsRequestDialogTest am: 72e7950da9 am: 6b6df8dc45

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24588597

Change-Id: I4a3fd664ee24e031fff4ce9e08ea18cae717c298
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>