This is precursor to adding new APIs for PK layout selection
implementation which will be handled in KeyboardLayoutManager.
Bug: 259530132
Test: atest KeyboardLayoutChangeTest
Change-Id: I99e396816838c05f28ce57ac50680a3369221921
Change-Id: I4f8ba5350e6affa9f6b2df31262c8aadafc0da05