UI Fixes

> Adding a scrim to the longpress cling

Bug: 17573777

High level design asks (very low-risk)
> Changing the dialog to use device default theme
> Updating screenpanel assets

Change-Id: Ia0216b60fd8cd607d83a5e7c3d7e6c8255125eda
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 7098760..37a7f5c 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -73,6 +73,7 @@
 import android.text.method.TextKeyListener;
 import android.util.DisplayMetrics;
 import android.util.Log;
+import android.view.ContextThemeWrapper;
 import android.view.Display;
 import android.view.Gravity;
 import android.view.HapticFeedbackConstants;
@@ -2555,7 +2556,7 @@
 
     private void showBrokenAppInstallDialog(final String packageName,
             DialogInterface.OnClickListener onSearchClickListener) {
-        new AlertDialog.Builder(this)
+        new AlertDialog.Builder(new ContextThemeWrapper(this, android.R.style.Theme_DeviceDefault))
             .setTitle(R.string.abandoned_promises_title)
             .setMessage(R.string.abandoned_promise_explanation)
             .setPositiveButton(R.string.abandoned_search, onSearchClickListener)