Fix task bar crashing in small screen with task bar / nav bar unification on

A few params are not set in device profile when task bar (in large screen) is not present, and hence the calculation below causes a crash

Test: Make sure that it doesn't crash in small screen gesture nav mode
Bug: 274517647
Change-Id: I3a61a64ac931fac4aee1a3c40ed54ab9ded298a7