Update javadoc for setLaunchDisplayId am: 334190f26e am: c37e102250 am: 14c9e48273

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12794770

Change-Id: Ib71e7d0b436949a87a960898625e946c7ebc19d1