Allows Accessibility to focus on specified view in AbstractFloatingView.

Here, the first item in an ArrowPopup or Folder are focused on.

Note: There's another pre-existing bug where it announces
"Home screen x of y" when the floating view appears; this
change doesn't address that.

Fixes: 147470419
Change-Id: I1dc70edc21ea7c19a5742208512738d6c4a94067
diff --git a/src/com/android/launcher3/AbstractFloatingView.java b/src/com/android/launcher3/AbstractFloatingView.java
index 572615f..cd27a2d 100644
--- a/src/com/android/launcher3/AbstractFloatingView.java
+++ b/src/com/android/launcher3/AbstractFloatingView.java
@@ -174,7 +174,8 @@
                 targetInfo.first, TYPE_WINDOW_STATE_CHANGED, targetInfo.second);
 
         if (mIsOpen) {
-            performAccessibilityAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null);
+            getAccessibilityInitialFocusView().performAccessibilityAction(
+                    AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null);
         }
         ActivityContext.lookupContext(getContext()).getDragLayer()
                 .sendAccessibilityEvent(TYPE_WINDOW_CONTENT_CHANGED);
@@ -184,6 +185,11 @@
         return null;
     }
 
+    /** Returns the View that Accessibility services should focus on first. */
+    protected View getAccessibilityInitialFocusView() {
+        return this;
+    }
+
     /**
      * Returns a view matching FloatingViewType
      */
diff --git a/src/com/android/launcher3/folder/Folder.java b/src/com/android/launcher3/folder/Folder.java
index fdf0ea4..c7487cb 100644
--- a/src/com/android/launcher3/folder/Folder.java
+++ b/src/com/android/launcher3/folder/Folder.java
@@ -745,6 +745,11 @@
                 : getContext().getString(R.string.folder_closed));
     }
 
+    @Override
+    protected View getAccessibilityInitialFocusView() {
+        return mContent.getFirstItem();
+    }
+
     private void closeComplete(boolean wasAnimated) {
         // TODO: Clear all active animations.
         DragLayer parent = (DragLayer) getParent();
diff --git a/src/com/android/launcher3/popup/ArrowPopup.java b/src/com/android/launcher3/popup/ArrowPopup.java
index 5b0c388..d5b32fc 100644
--- a/src/com/android/launcher3/popup/ArrowPopup.java
+++ b/src/com/android/launcher3/popup/ArrowPopup.java
@@ -389,6 +389,11 @@
         return Pair.create(this, "");
     }
 
+    @Override
+    protected View getAccessibilityInitialFocusView() {
+        return getChildCount() > 0 ? getChildAt(0) : this;
+    }
+
     private void animateOpen() {
         setVisibility(View.VISIBLE);