Fix NPE in LauncherSwipeHandlerV2Test.setup

RecentsDisplayModel doesn't need to be a mock. If it is mocked, then RecentsDisplayModel.getFallbackWindowInterface also needs to be mocked.

Flag: com.android.launcher3.enable_fallback_overview_in_window
Bug: 377678992
Test: pre/post submit
Change-Id: Iceb7c9cf6e9c3b0f3d08f85097ee3fde7e71f157
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/LauncherSwipeHandlerV2Test.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/LauncherSwipeHandlerV2Test.kt
index 41877c9..648776c 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/LauncherSwipeHandlerV2Test.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/LauncherSwipeHandlerV2Test.kt
@@ -53,8 +53,6 @@
 
     @Mock private lateinit var systemUiProxy: SystemUiProxy
 
-    @Mock private lateinit var recentsDisplayModel: RecentsDisplayModel
-
     @Mock private lateinit var msdlPlayerWrapper: MSDLPlayerWrapper
 
     private lateinit var underTest: LauncherSwipeHandlerV2
@@ -72,7 +70,7 @@
         sandboxContext.initDaggerComponent(
             DaggerTestComponent.builder()
                 .bindSystemUiProxy(systemUiProxy)
-                .bindRecentsDisplayModel(recentsDisplayModel)
+                .bindRecentsDisplayModel(RecentsDisplayModel(sandboxContext))
         )
 
         val deviceState = mock(RecentsAnimationDeviceState::class.java)