Stop clearing focus when snapping to a new workspace page.

Clearing the focus was causing the first child in the new page to
immediately take focus, which caused FocusIndicatorView jank when
using a keyboard.

Bug: 25256728
Change-Id: I5ab31ebc3fe370d7ac9e9792b30dab3467023738

src/com/android/launcher3/FocusHelper.java

@@ -397,7 +397,6 @@ public class FocusHelper {
                 if (newIconIndex == FocusLogic.PREVIOUS_PAGE_LEFT_COLUMN) {
                     newPageIndex = pageIndex - 1;
                 }
-                workspace.snapToPage(newPageIndex);
                 row = ((CellLayout.LayoutParams) v.getLayoutParams()).cellY;
                 parent = getCellLayoutChildrenForIndex(workspace, newPageIndex);
                 if (parent != null) {

src/com/android/launcher3/PagedView.java

@@ -2078,11 +2078,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         whichPage = validateNewPage(whichPage);
 
         mNextPage = whichPage;
-        View focusedChild = getFocusedChild();
-        if (focusedChild != null && whichPage != mCurrentPage &&
-                focusedChild == getPageAt(mCurrentPage)) {
-            focusedChild.clearFocus();
-        }
 
         pageBeginMoving();
         awakenScrollBars(duration);