Flipped widths of Nexus 4 and Nexus 5 in InvariantDeviceProfile.

Without this change, Nexus 4 uses the Nexus 5 device profile and
vice versa. But because the profiles have exactly the same values,
it didn't matter that they were flopped.

Change-Id: I3fd788e040feb8de5bb5f5e336acbd4ac995dc0f