Handle maximizing non-resizable activities in desktop mode

Updating maximize logic so if activity is non-resizable, then maximize the window to max bounds within the display bounds (within status bar and taskbar) while keeping aspect ratio

Bug: 327586333
Test: atest com.android.wm.shell.desktopmode.DesktopTasksControllerTest
Test: manually checking maximzed non-resizable apps (Among Us, Speedtest, App Compat test app)
Flag: EXEMPT bugfix
Change-Id: Icff526f15a87b1936ba7aad1ac2afd5ed4db50b0