Add dump for PredictionRowView.

adb shell dumpsys activity NexusLauncherActivity : https://paste.googleplex.com/4907497231482880

When AllApps prediction is off : https://paste.googleplex.com/5930628737925120

Bug: 332171918
Test: Manual
Flag: NA
Change-Id: I753ff876aab162026d99fd1b35f63edf2e712f70

quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java

@@ -1411,6 +1411,10 @@ public class QuickstepLauncher extends Launcher {
         if (mHotseatPredictionController != null) {
             mHotseatPredictionController.dump(prefix, writer);
         }
+        PredictionRowView<?> predictionRowView =
+                getAppsView().getFloatingHeaderView().findFixedRowByType(
+                        PredictionRowView.class);
+        predictionRowView.dump(prefix, writer);
     }
 
     @Override