Do not remove toast window token without removing window

 This causes the 2nd call to removeWindowToken from finishWindowTokenLocked
  to fail because the window token has been removed from WMS.
 This causes window leaks in some edge cases, ie. b/286495456.

Test: atest WindowUntrustedTouchTest
 atest ToastWindowTest
 atest ToastPresenterTest
 atest ToastUITest

Bug: 204272000
Bug: 286495456
Bug: 282262771
Change-Id: I43e640c230fed0fac85631fe584e77d901af0949