With a Framework-side change [1],
InputManager#{get, set}KeyboardLayoutForInputDevice() are now able to
deal with null InputMethodSubtype as a valid input. With this CL, we no
longer filter out IMEs that do not support subtypes in
PhysicalKeyboardFragment.
[1]: Ia013784a594ad3beaf30976d047f5ac0fa8185be
Bug: 28182650
Change-Id: I46b9c5b018f08e3eaa4614a0893db0be91652f3c
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