* In IME side, wait for the input start before calling back to Autofill,
rather than returning inline unsupported immediately.
* Also adds an InlineSuggestionManager to simplify code in the
InputMethodService
Test: atest CtsAutoFillServiceTestCases
Test: atest CtsInputMethodTestCases
Bug: 151123764
Change-Id: I199925d77aa508f259e98a8929120aeb96015b57