Add log dumps for taskbar state

Test: created bugreport and checked logs
Bug: -
Change-Id: Ic0c2330b18c8daf181ae5b236e0c4b212d630fa3

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

@@ -39,10 +39,12 @@ import com.android.launcher3.util.LauncherBindableItemsContainer;
 import com.android.launcher3.util.MultiValueAlpha;
 import com.android.quickstep.AnimatedFloat;
 
+import java.io.PrintWriter;
+
 /**
  * Handles properties/data collection, then passes the results to TaskbarView to render.
  */
-public class TaskbarViewController {
+public class TaskbarViewController implements TaskbarControllers.LoggableTaskbarController {
     private static final Runnable NO_OP = () -> { };
 
     public static final int ALPHA_INDEX_HOME = 0;
@@ -258,6 +260,12 @@ public class TaskbarViewController {
         return mTaskbarView.isEventOverAnyItem(ev);
     }
 
+    @Override
+    public void dumpLogs(String prefix, PrintWriter pw) {
+        pw.println(prefix + "TaskbarViewController:");
+        mModelCallbacks.dumpLogs(prefix + "\t", pw);
+    }
+
     /**
      * Callbacks for {@link TaskbarView} to interact with its controller.
      */