Added view.invalidate() in testComputeScroll.

This test examines the value of flag set in computeScroll() is true or not.
The process of computeScroll() is done asynchronously form different process when scroll information needs to be updated after requestLayout().

However, computeScroll() is only called when scroll information needs updated.
If it does not require updated information this test fails.

To avoid this, I called view.invalidate() to modify to redraw the view.

Change-Id: I66ea1a4200b8ed2be8f142a11a9a23f4b4fb65f3
diff --git a/tests/tests/view/src/android/view/cts/ b/tests/tests/view/src/android/view/cts/
index 6706c37..74a5f8c 100644
--- a/tests/tests/view/src/android/view/cts/
+++ b/tests/tests/view/src/android/view/cts/
@@ -571,6 +571,7 @@
         runTestOnUiThread(new Runnable() {
             public void run() {
+                view.invalidate();