Update IMMI#switchKeyboardLayout() to take display ID and targetWindowToken

To support multi-session IME, IMMI needs to know the window to which
the keyboard layout switch is dispatched, and the target window token.

This CL just passes unused parameters to IMMS. It doesn't change
the behavior of the code, thus no flag is required. The passed
parameters will be used by another CL to implement the multi-session
IME, and that CL will be protected by the concurrent_input_methods
feature flag.

Bug: 305829876
Test: atest WmTests && atest FrameworksServicesTests
Change-Id: Ie15b29247304e027dfef58ef683e5139f2ee4d35