Fix: Selection handles are wrongly shown.

Selection handles were always shown when selection action
mode is started at first time. When the action mode is
started without a selection, only insertion handle must be
shown.

Bug: 20264980
Bug: 20407551

Change-Id: I630804e007f795d28f87e3fa6cba0de5bf588c78

core/java/android/widget/Editor.java

@@ -3023,8 +3023,10 @@ public class Editor {
         public SelectionActionModeCallback() {
             SelectionModifierCursorController selectionController = getSelectionController();
             if (selectionController.mStartHandle == null) {
+                // As these are for initializing selectionController, hide() must be called.
                 selectionController.initDrawables();
                 selectionController.initHandles();
+                selectionController.hide();
             }
             mSelectionHandleHeight = Math.max(
                     mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight());