Remove the ability to override dev options from adb

This is not required anymore and had a large performance implication,
even if for userdebug builds only.

Bug: 416813838
Bug: 422446965
Flag: com.android.window.flags.show_desktop_experience_dev_option
Test: manual
Test: atest DesktopExperienceFlagsTest
Change-Id: I73132470f87cb8c73491bbb159adac143664293d