Merge "Make WallpaperMS bind wallpaper component PendingIntent immutable." into qt-dev am: e174ab0148 am: 02513e4866 am: 676b35b98e am: b7c896bef2

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

Change-Id: I87274ba204aaa1800644505636dff5415faf02b9