Remove task regardless of displayId

Using taskInfo.displayId to removeTask if task is launching in different
display will result in no task being removed. TaskId should be unique so
if conditions require task to be removed, repository should remove task
regardless of where it was first launched.

Flag: EXEMPT bug fix
Test: atest WMShellUnitTests
Fix: 415284139
Change-Id: I4d246611b37a63a095710f1f27d2d8ed506dfb01