Fix test: Do not assert that currentInputStarted flag is set after hiding the IME

The test method verifyInputViewStatusInternal always expected IMS#getCurrentInputStarted() to return true, after the IME was requested to be hidden. This is no longer valid as hiding the IME resets that flag (IMS#doFinishInput).

Test: InputMethodServiceTest#testShowHideKeyboard_byUserAction
Fix: 374069996
Flag: android.view.inputmethod.refactor_insets_controller
Change-Id: Ie01f568e6625d3df0ea08dfe68152f6aa864bc10