Make IInputMethodManager to oneway (11/N)

Comply following methods to IVoidResultCallback to emulate
current behavior and apply them to one-way.

-. startProtoDump
-. startImeTrace
-. stopImeTrace

Bug: 163453493
Test: atest CtsInputMethodTestCases
Test: 1) Enable the Winscope Trace tile
      2) Do some actions like open keyboard
      3) Disable the Winscope Trace tile
      4) Grad a bugreport and verify trace on go/Winscope
Change-Id: I3eafbc28ed3acf3ba859885bf201cb06b3149b94