Merge "Add a desktop mode API to hide stashed apps" into udc-qpr-dev am: 23a2a804 am: 7dcd1c1d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23295781



Change-Id: I7c7d40afd104e09f2c2b5b15e8594620567ee5b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>