Stop announcing suggestions strip content while more keys keyboard is showing

This CL also supports announcing dismissing of a more keys keyboard.

Bug: 15582905
Change-Id: Ia9e5d6c7e3e23dac39ee570b20d32f0141ae6184

java/src/com/android/inputmethod/accessibility/MoreKeysKeyboardAccessibilityDelegate.java

@@ -55,6 +55,10 @@ public class MoreKeysKeyboardAccessibilityDelegate
         sendWindowStateChanged(mOpenAnnounceResId);
     }
 
+    public void onDismissMoreKeysKeyboard() {
+        sendWindowStateChanged(mCloseAnnounceResId);
+    }
+
     @Override
     protected void onHoverEnter(final MotionEvent event) {
         if (DEBUG_HOVER) {
@@ -112,6 +116,5 @@ public class MoreKeysKeyboardAccessibilityDelegate
         // TODO: Should fix this reference. This is a hack to clear the state of
         // {@link PointerTracker}.
         PointerTracker.dismissAllMoreKeysPanels();
-        sendWindowStateChanged(mCloseAnnounceResId);
     }
 }

java/src/com/android/inputmethod/keyboard/MoreKeysKeyboardView.java

@@ -207,6 +207,10 @@ public class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel
         if (!isShowingInParent()) {
             return;
         }
+        final MoreKeysKeyboardAccessibilityDelegate accessibilityDelegate = mAccessibilityDelegate;
+        if (accessibilityDelegate != null) {
+            accessibilityDelegate.onDismissMoreKeysKeyboard();
+        }
         mController.onDismissMoreKeysPanel();
     }
 

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java

@@ -33,6 +33,7 @@ import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
 import android.view.ViewParent;
+import android.view.accessibility.AccessibilityEvent;
 import android.widget.ImageButton;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
@@ -414,6 +415,12 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
         return false;
     }
 
+    @Override
+    public boolean dispatchPopulateAccessibilityEvent(final AccessibilityEvent event) {
+        // Don't populate accessibility event with suggested words and voice key.
+        return true;
+    }
+
     @Override
     public boolean onTouchEvent(final MotionEvent me) {
         // In the sliding input mode. {@link MotionEvent} should be forwarded to