Add protologs for updating IME targets and parent

This adds some extra protologs for updating the IME layering target,
IME input target, IME control target, IME surface parent, and for
assinging the relative layer for the IME.

FLAG: EXEMPT logging
Bug: 281029564
Test: n/a
Change-Id: I7fdd06f23e302deda7058101626e98539622f002