Accessibility fixes

> Enabling top bar buttons in accessibility drag-drop
> Unifying logic to show delete/uninstall/app-info targets
> Announcing cell loction as 1-index instead of 0-index

Change-Id: Ibc7801f77e938b2646f0655462cbe9b7f781818b
diff --git a/src/com/android/launcher3/SearchDropTargetBar.java b/src/com/android/launcher3/SearchDropTargetBar.java
index af8bc75..44a76b7 100644
--- a/src/com/android/launcher3/SearchDropTargetBar.java
+++ b/src/com/android/launcher3/SearchDropTargetBar.java
@@ -180,6 +180,9 @@
         prepareStartAnimation(mDropTargetBar);
         mShowDropTargetBarAnim.start();
         hideSearchBar(true);
+        if (mQSBSearchBar != null) {
+            mQSBSearchBar.setVisibility(View.GONE);
+        }
     }
 
     /**
@@ -190,6 +193,9 @@
         prepareStartAnimation(mDropTargetBar);
         mShowDropTargetBarAnim.reverse();
         showSearchBar(true);
+        if (mQSBSearchBar != null) {
+            mQSBSearchBar.setVisibility(View.VISIBLE);
+        }
     }
 
     /*
@@ -228,4 +234,13 @@
             return null;
         }
     }
+
+    public void enableAccessibleDrag(boolean enable) {
+        if (mQSBSearchBar != null) {
+            mQSBSearchBar.setVisibility(enable ? View.GONE : View.VISIBLE);
+        }
+        mInfoDropTarget.enableAccessibleDrag(enable);
+        mDeleteDropTarget.enableAccessibleDrag(enable);
+        mUninstallDropTarget.enableAccessibleDrag(enable);
+    }
 }