Fix AugmentedAutofillService onFillRequest() wrong focused AutofillId for WebView

When AutofillManagerService try to trigger AugmentedAutofill, it uses
AutofillId.withoutSession() to get the AutollId without session. It
will return invalid "parentId:NO_ID" if the virtual AutofillId is
created with FLAG_IS_VIRTUAL_INT. The virtual AutofillId flag should
be FLAG_IS_VIRTUAL_INT or FLAG_IS_VIRTUAL_LONG, we should get
mVirtualIntId for FLAG_IS_VIRTUAL_INT or mVirtualLongId for
FLAG_IS_VIRTUAL_LONG.

Bug: 156408900
Test: atest android.autofillservice.cts.augmented
Test: atest android.view.autofill.AutofillIdTest#\
testVirtual_Long_withoutSession
Test: atest android.view.autofill.AutofillIdTest#\
testVirtual_Int_withoutSession
Test: Manual. Write a simple cts test for webview and check the
focused AutofillId is correct while switching between the field.

Change-Id: I7ebb4d7cfb6d6f383724b798dae69269ae3a27be