Disable model loading in Taskbar unit tests.

We do not need this for now and it is making development more difficult on macs.

Test: Taskbar unit tests
Bug: 230027385
Flag: TEST_ONLY
Change-Id: I2e74e91e21aa650544d8264fab7b336b97b52547

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -46,6 +46,7 @@ import android.view.View;
 import android.view.animation.Interpolator;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import androidx.core.view.OneShotPreDrawListener;
 
 import com.android.app.animation.Interpolators;
@@ -96,6 +97,8 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
     public static final int ALPHA_INDEX_SMALL_SCREEN = 6;
     private static final int NUM_ALPHA_CHANNELS = 7;
 
+    private static boolean sEnableModelLoadingForTests = true;
+
     private final TaskbarActivityContext mActivity;
     private final TaskbarView mTaskbarView;
     private final MultiValueAlpha mTaskbarIconAlpha;
@@ -192,7 +195,7 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
         mTaskbarIconTranslationXForPinning.updateValue(pinningValue);
 
         mModelCallbacks.init(controllers);
-        if (mActivity.isUserSetupComplete()) {
+        if (mActivity.isUserSetupComplete() && sEnableModelLoadingForTests) {
             // Only load the callbacks if user setup is completed
             LauncherAppState.getInstance(mActivity).getModel().addCallbacksAndLoad(mModelCallbacks);
         }
@@ -924,4 +927,10 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
 
         mModelCallbacks.dumpLogs(prefix + "\t", pw);
     }
+
+    /** Enables model loading for tests. */
+    @VisibleForTesting
+    public static void enableModelLoadingForTests(boolean enable) {
+        sEnableModelLoadingForTests = enable;
+    }
 }