Fix LockPreviewContainer disappears in ImagePreviewFragment

Revert back to original logic for showing lock screen container when it's selected in ImagePreviewFragment.

Bug: 199461153
Test: Manual
Change-Id: I5560c81add0abf07a311e0342e5f683166f09363
diff --git a/src/com/android/wallpaper/picker/ImagePreviewFragment.java b/src/com/android/wallpaper/picker/ImagePreviewFragment.java
index 3919b29..9a91b96 100755
--- a/src/com/android/wallpaper/picker/ImagePreviewFragment.java
+++ b/src/com/android/wallpaper/picker/ImagePreviewFragment.java
@@ -615,8 +615,7 @@
         mWorkspaceSurface.setVisibility(isHomeSelected && mIsSurfaceCreated ? View.VISIBLE :
                 View.GONE);
 
-        mLockPreviewContainer.setVisibility(isHomeSelected && mIsSurfaceCreated ? View.VISIBLE :
-                View.GONE);
+        mLockPreviewContainer.setVisibility(isHomeSelected ? View.INVISIBLE : View.VISIBLE);
 
         mFullScreenAnimation.setIsHomeSelected(isHomeSelected);
     }