Expose PendingIntent.addCancelListener am: 30bd1bb72d am: 81767ac876 am: 7baac81d13

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15879510

Change-Id: I30b8bca4033f96ce54c68a60a819a2d1d9179f34