Add OneHandedMainSwitchPreferenceController in the
exempt_slice_controller_not_in_xml

Add OneHandedMainSwitchPreferenceController in the xml file to
avoid Settings RunSettingsRoboTests fail.

Bug: 289967656

Test: atest CodeInspectionTest (depends on ag/23891767)
Change-Id: I916c0eab544ccef59d65a4d4131edda5f87e1980
1 file changed