Make IInputMethodPrivilegedOperations to async (1/N)

-. Remove VoidResultCallback of setImeWindowStatus
   and let it be asynchronous.
-. Rename function naming to setImeWindowStatusAsync.

Bug: 183587528
Test: atest CtsInputMethodTestCases
Change-Id: Ia9f19ca5ae418089ce43816dcd50487e1b1172f1
4 files changed