Move the logic of transferTouchFocusToImeWindow to IMMS.

It would better move logic of transferTouchFocusToImeWindow
from WindowManagerService to InputMethodManagerService.

Bug: 149574510
Test: atest CtsAutoFillServiceTestCases
Test: atest CtsInputMethodTestCases
Change-Id: I268b09781e5eb7c77c4912efdc8fd5d6936ada27
8 files changed