Fix a compilation error due to 1.8 type inference differences

The code does not compile when the Jack compiler is set to
-D jack.java.source.version=1.8.

The change has no functional impact.

Bug: 26753820
Change-Id: I19d3ffd65e31648d95bb7701d89710015cfaf552
diff --git a/packages/SystemUI/src/com/android/systemui/recents/tv/views/TaskStackHorizontalViewAdapter.java b/packages/SystemUI/src/com/android/systemui/recents/tv/views/TaskStackHorizontalViewAdapter.java
index 7b62f4e..f154331 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/tv/views/TaskStackHorizontalViewAdapter.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/tv/views/TaskStackHorizontalViewAdapter.java
@@ -65,7 +65,7 @@
     }
 
     public TaskStackHorizontalViewAdapter(List tasks) {
-        mTaskList = new ArrayList<>(tasks);
+        mTaskList = new ArrayList<Task>(tasks);
     }
 
     public void setNewStackTasks(List tasks) {