This CL moves InputMethodManagerService (IMMS)
from com.android.server
to com.android.server.inputmethod
so that we can mechanically factor out inner classes from IMMS to
separate package private classes.
This is purely a mechanical refactoring of an implementation detail.
There should be no observable behavior difference.
Fix: 114660660
Test: atest CtsInputMethodTestCases CtsInputMethodServiceHostTestCases
Test: atest FrameworksCoreTests:com.android.internal.inputmethod
Change-Id: I023d8f2863601ee54f304988117d8ea750770f70
603f4d00c6