Merge "Remove split pair according to last visible task" into tm-qpr-dev am: d4ae1a52

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21334258



Change-Id: Ia1f01d8278357d914eee54c07b7210e5ec1b8f8c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>