Merge "Only allow system or sysui to set launch activity type" into sc-dev am:...

Merge "Only allow system or sysui to set launch activity type" into sc-dev am: 8f5d0a87 am: 3cc8dc30

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14613436

Change-Id: Ib8db91586208d85fce507ae1d51d2ce0adbd831f