Update EditorInfo if servedView's orientation changes

IME's fullscreen mode relies on app's orientation. This info may be out
of date in EditorInfo post orientation change. this CL calls
restartInput to update editorInfo.

Fix: 193202504
Test: CtsInputMethodTestCases
Change-Id: I0b87a6fb73182a08ab7486255e5d26ec1ee4e85c