Fix |displayId| argument for desktop clean up from alt+tab..

..and other to-fullscreen changes when the task being moved is a
recent (non-running task).

Instead of using |TaskInfo.displayId| which may be invalid, use the
displayId associated with the deactivating desk.

Also no-ops and logs a warning from HomeIntentProvider.

Flag: EXEMPT BUGFIX
Fix: 441678801
Test: atest WMShellUnitTests
Change-Id: I40669d64bdeee05558cdfeea6214b6296b466c19