Added support for Update Super Task

Test: tested flashall on raven
Bug: 194686221
Change-Id: Ifc99af77f9235bf56a549f53e7d43575686fb42b
diff --git a/fastboot/task.h b/fastboot/task.h
index 7acb3d5..630278a 100644
--- a/fastboot/task.h
+++ b/fastboot/task.h
@@ -70,3 +70,12 @@
     std::unique_ptr<SuperFlashHelper> helper_;
     SparsePtr sparse_layout_;
 };
+
+class UpdateSuperTask : public Task {
+  public:
+    UpdateSuperTask(FlashingPlan* fp);
+    void Run() override;
+
+  private:
+    FlashingPlan* fp_;
+};