Pass layout info in native callback for quicker layout setup.

Passing language tag and layout type to getKeyboardLayoutOverlay()
callback allows us to setup keyboard layout before device creation
is complete. Hence when we get onInputDeviceAdded() is callback, the
layout is already set up.

Test: atest VirtualKeyboardLayoutTest
Bug: 271905768
Change-Id: I46a6e4b0f512beb4a560374feda4104ff32d27cc