Add metrics for taskbar 3 button nav

Fixes: 221075063
Test: wwlogcat shows right events,
new events show up on aster dashboard

Change-Id: I3864ac02ea00f281d33ccb26b95a4916bd8b6be9

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

@@ -19,6 +19,7 @@ import android.content.pm.ActivityInfo.Config;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 
 import com.android.launcher3.taskbar.allapps.TaskbarAllAppsController;
 import com.android.systemui.shared.rotation.RotationButtonController;
@@ -121,6 +122,7 @@ public class TaskbarControllers {
         taskbarForceVisibleImmersiveController.init(this);
         taskbarAllAppsController.init(this, sharedState);
         taskbarRecentAppsController.init(this);
+        navButtonController.init(this);
 
         mControllersToLog = new LoggableTaskbarController[] {
                 taskbarDragController, navButtonController, navbarButtonsViewController,
@@ -158,6 +160,7 @@ public class TaskbarControllers {
         taskbarForceVisibleImmersiveController.onDestroy();
         taskbarAllAppsController.onDestroy();
         taskbarRecentAppsController.onDestroy();
+        navButtonController.onDestroy();
 
         mControllersToLog = null;
     }
@@ -190,6 +193,12 @@ public class TaskbarControllers {
         rotationButtonController.dumpLogs(prefix + "\t", pw);
     }
 
+    @VisibleForTesting
+    TaskbarActivityContext getTaskbarActivityContext() {
+        // Used to mock
+        return taskbarActivityContext;
+    }
+
     protected interface LoggableTaskbarController {
         void dumpLogs(String prefix, PrintWriter pw);
     }