Modification of testSetHorizontalSpacing()

Whenever the horizontal resolution exceeds 1056 dots,

testSetHorizontalSpacing() is failed.

The parameter of mGridView.setNumColumns() is changed from 22 to 28.

The test case is also passed on a terminal  of horizontal resolution
of 1344 dots.

Change-Id: Id268f167319f833bd35f7e60b04c461101d7042a
diff --git a/tests/tests/widget/src/android/widget/cts/GridViewTest.java b/tests/tests/widget/src/android/widget/cts/GridViewTest.java
index 84c07f7..50a7bae 100755
--- a/tests/tests/widget/src/android/widget/cts/GridViewTest.java
+++ b/tests/tests/widget/src/android/widget/cts/GridViewTest.java
@@ -312,7 +312,8 @@
         mGridView.setStretchMode(GridView.NO_STRETCH);
         // Number of columns should be big enough, otherwise the
         // horizontal spacing cannot be correctly verified.
-        mGridView.setNumColumns(22);
+        mGridView.setNumColumns(28);
+
 
         // this test case can not be ran in UI thread.
         mActivity.runOnUiThread(new Runnable() {