Passing activity token for identify sourceTask

System will launch activity into taskDisplayArea if can not
identify the sourceTask.  This CL passing the activity token
from CrossProfileApps#mContext as the calling activity and
add the new_task flag. That will make activity launches into
split with different tasks when switching profile.

Bug: 223405562
Test: split (A|B),switch the work/personal profile from split.
      atest CrossProfileAppsTest
Change-Id: I3bc713aa72985b93b42c288e23bec7f12dd6a01d