Fix not able to launch multi-instance with drag and drop gesture

There are apps using alias activity name, result to wm-shell not able to
determine whether it's launching the same component or not. Update to
check the component name in the intent that created the task instead to
prevent affected by alias component name.

Fix: 224901460
Fix: 234304765
Fix: 233922245
Fix: 233174334
Fix: 232034346
Test: atest WMShellUnitTests
Test: manual check drag to launch multi-instance or drag to switch
      split position with reported apps work
Change-Id: I924120134bb3ce6abe582251e3afdc7a0825a6a5