Secure the pendingIntent in SearchWidgetProvider. am: ae2c873754 am: a51a669fe6 am: 1367aef11c am: 78a2c7633d am: e0fcc36980

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/QuickSearchBox/+/15806296

Change-Id: I1f0f0de3d6fa9d432fd57b555f376cf78cba5939