Make TextView do not show IME when fill dialog popup

Make to show fill dialog only if IME is not showing. And if the field
will show fill dialog, ignore to show ime when clicks on the field.

Bug: 210926084
Test: Manual
  launch sample and click on password field -> show fill dialog
  click on username field (no fill dialog) -> show fill UI and IME
  IME is showing and click on password field -> show fill UI
Test: atest android.autofillservice.cts.dialog.LoginActivityTest
Test: atest android.widget.cts.EditTextTest
Change-Id: I6080510d87c50969d85fd9ed746ceba7e3c1c685