Add outline to shortcuts when focused.

Bug: 30563273
Change-Id: Ia54c112dcf91c225588b7388001eb93ee5c03171

res/drawable/bg_pill_focused.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true">
+        <shape xmlns:android="http://schemas.android.com/apk/res/android"
+               android:shape="rectangle">
+            <stroke android:color="#616161" android:width="2dp"/>
+            <corners android:radius="@dimen/bg_pill_radius" />
+        </shape>
+    </item>
+</selector>

res/layout/deep_shortcut.xml

@@ -26,7 +26,8 @@
         style="@style/Icon.DeepShortcut"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:focusable="true" />
+        android:focusable="true"
+        android:background="@drawable/bg_pill_focused" />
 
     <View
         android:id="@+id/deep_shortcut_icon"

src/com/android/launcher3/dragndrop/DragLayer.java

@@ -506,7 +506,9 @@ public class DragLayer extends InsettableFrameLayout {
 
     @Override
     public boolean dispatchUnhandledMove(View focused, int direction) {
-        return mDragController.dispatchUnhandledMove(focused, direction);
+        // Consume the unhandled move if a container is open, to avoid switching pages underneath.
+        boolean isContainerOpen = mLauncher.getTopFloatingView() != null;
+        return isContainerOpen || mDragController.dispatchUnhandledMove(focused, direction);
     }
 
     @Override