Merge "Not resume the invisible TaskFragment when resume top Task" into sc-v2-dev am: db888014dc am: 48478699fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15574561

Change-Id: I6ba07ec8b89273fc0088f546f7953a7c6c9efd7e