Merge changes from topics "add_boarder", "wallpaper_bottom_bar" into ub-launcher3-master

* changes:
  Add the border to the selected wallpaper.
  Implement the bottom action bar for the wallpaper section.
diff --git a/Android.mk b/Android.mk
index a098ee2..a0d05cb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -26,7 +26,7 @@
 LOCAL_MODULE_TAGS := optional
 
 LOCAL_STATIC_ANDROID_LIBRARIES := WallpaperPicker2CommonDepsLib
-LOCAL_STATIC_JAVA_LIBRARIES := styleprotosnano SystemUI-statsd
+LOCAL_STATIC_JAVA_LIBRARIES := styleprotosnano SystemUI-statsd SystemUISharedLib
 LOCAL_PROGUARD_ENABLED := disabled
 LOCAL_SDK_VERSION := system_current
 
diff --git a/res/values/styles.xml b/res/values/styles.xml
index d612a32..eb88140 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -38,6 +38,10 @@
         <item name="android:windowNoTitle">true</item>
         <item name="android:fitsSystemWindows">false</item>
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowDisablePreview">true</item>
     </style>
 
     <!-- Bottom nav -->