Show physical keyboard settings even when IME is enabled.

The WindowManager lies about the configuration in order to get the
IME to show but the Settings page should still show the physical
keyboard options if one is connected though, so remove the
configuration check and just always check to see if there's a full
keyboard connected.

Bug: 14066881
Change-Id: I085fe4160f3524f3c95737a6809ee03fec5230b4