Fix lock screen wallpaper

LockscreenWallpaper was set to null on NotificationMediaManager because
StatusBar#mWallpaperSupported was not initialized yet.

Fixes: 146252300
Test: manual
Change-Id: I4c5151ad6b40d0f0996fdbb825745729cc003425

packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java

@@ -813,6 +813,8 @@ public class StatusBar extends SystemUI implements DemoMode,
                 ServiceManager.getService(Context.STATUS_BAR_SERVICE));
 
         mKeyguardManager = (KeyguardManager) mContext.getSystemService(Context.KEYGUARD_SERVICE);
+        mWallpaperSupported =
+                mContext.getSystemService(WallpaperManager.class).isWallpaperSupported();
 
         // Connect in to the status bar manager service
         mCommandQueue.addCallback(this);
@@ -826,9 +828,6 @@ public class StatusBar extends SystemUI implements DemoMode,
 
         createAndAddWindows(result);
 
-        mWallpaperSupported =
-                mContext.getSystemService(WallpaperManager.class).isWallpaperSupported();
-
         if (mWallpaperSupported) {
             // Make sure we always have the most current wallpaper info.
             IntentFilter wallpaperChangedFilter = new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED);