Inline InputMethodSettings#isShowImeWithHardKeyboardEnabled

In order to remove the dependency on InputMethodSettings from
InputMethodMenuController, this CL inlines

  InputMethodSettings#isShowImeWithHardKeyboardEnabled

with keeping the current behavior.

This is a mechanical refactoring CL. There must be no observable
behavior change.

Bug: 309868254
Bug: 309837937
Test: presubmit
Change-Id: I0c3e0e16f361dff84c3b79040a9a83058512088f