Make WallpaperMS bind wallpaper component PendingIntent immutable. am: b392903

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12718696

Change-Id: I657d45a8a9358ae644cb074804242184f306292a

Author: wilsonshih

services/core/java/com/android/server/wallpaper/WallpaperManagerService.java

@@ -2104,7 +2104,7 @@ boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force,
                     mContext, 0,
                     Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER),
                             mContext.getText(com.android.internal.R.string.chooser_wallpaper)),
-                    0, null, new UserHandle(serviceUserId)));
+                    PendingIntent.FLAG_IMMUTABLE, null, new UserHandle(serviceUserId)));
             if (!mContext.bindServiceAsUser(intent, newConn,
                     Context.BIND_AUTO_CREATE | Context.BIND_SHOWING_UI
                             | Context.BIND_FOREGROUND_SERVICE_WHILE_AWAKE,