Merge "Use isSplitActive vs visible when detecting mixed pip/split" into udc-dev am: aeac802e am: 989d47ed

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22999843



Change-Id: Icef3c990198175db62bbc6c622bb938e02cc2a11
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>