Remove the InlineActions API

* Use the original authentication instead
* Also support sending intent from augmented autofill, with the
  limitation of not supporting sending back the FillResponse or
  Dataset from the activity result

Test: manual
Test: atest android.autofillservice.cts.inline
Test: atest android.autofillservice.cts.FillResponseTest
Test: atest android.autofillservice.cts.augmented
Test: atest android.autofillservice.cts.LoginActivityTest
Bug: 150499490

Change-Id: I81031ff456adb4c07f530188dda80e97cc84b707