Autofill a manual request directly when it only has one dataset.

Tests:
- renamed testManualAutofill() to testManualAutofillOneDataset()
- added testManualAutofillTwoDatasetsPickFirst()
- added testManualAutofillTwoDatasetsPickSecond()

Bug: 35708229
Test: LoginActivityTest pass
Test: manual verification
Change-Id: I7aa60ab5df60decaf49d617bf3e9fcf3ab0074fa
1 file changed