Merge "Make WallpaperMS bind wallpaper component PendingIntent immutable." into qt-dev am: e174ab0148 am: 02513e4866

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12719027

Change-Id: I186d804f3c47caa6b879f5b60713b7adf1ddf2e3