Pass focused field's ViewNode information in the augmented autofill request

* Only regular view's viewnode info is produced. Virtual view is not
  support yet, for efficiency reasons.

Test: manual
Test: atest android.autofillservice.cts.inline
Test: atest android.autofillservice.cts.augmented
Bug: 141703532
Change-Id: Ib9aa75ebf8504d674513bd0e6528460ba9db2c34