Remove unnecessary "I" from IIInputContentUriTokenResultCallback

This is a mechanical refactoring CL that does nothing but remaning

  IIInputContentUriTokenResultCallback

to

  IInputContentUriTokenResultCallback.

There should be no observable behavior change in this CL.

Bug: 173340613
Bug: 194308519
Test: presubmit
Change-Id: Id37fd7c44145934aea42d7944e5b212c6ff543f6