Move *InlineSuggestions* to com.android.internal.inputmethod

This CL moves 4 files that match *InlineSuggestions* from

  com.android.internal.view

to

  com.android.internal.inputmethod

as they are basically used only by IME classes (and Autofill).

Hopefully this gives better code organization and maintainance.

This is a mechanical refactoring of internal details.  There should be
no user/developer observable behavior change in this CL.

Bug: 234882948
Test: presubmit
Change-Id: Iac696ae501953ab6a90d99112a62221454cd76e4