Input settings: Associate keyboard layouts with device/IME subtype.

Implements selection of keyboard layouts using the new InputManager
methods that associate keyboard layouts to
device/InputMethodInfo/InputMethodSubtype
See: Ie88ce1ab77dbfe03ab51d89c1dc9e0a7ddbb3216

Bug: 25752812
Change-Id: Ib76880d66391ca37978054de80f4b3b5147cecc3
6 files changed