Force calculator to launch in fullscreen for taskbar tests

Taskbar tests are flaking when desktop windowing is enabled due to calculator app being launched in splitscreen unexpectedly during test setup (due to unexpected effect of DesktopModeLaunchParamsModifier on activity launch.) While looking into root cause, this temporary fix to address the test failures ensures that calculator app is always launched in fullscreen, by enforcing it with ActivityOptions.

Bug: 333446588
Bug: 333446588
Flag: None
Test: atest NexusLauncherTests:com.android.quickstep.TaplTestsTaskbar
Test: forrest build with CL (https://android-build.corp.google.com/builds/abtd/run/L47500030003265061)
Change-Id: If12e8490214aa1dd5de89ff8535495c2a0c1fe82