Fixed AutofillOptions.isAugmentedAutofillEnabled to use the right client.

Also removed ContentCaptureClient, which is not used anymore (it probably became obsolete with the
ContentCaptureOptions optimization).

Fixes: 130585342
Test: atest CtsAutoFillServiceTestCases:android.autofillservice.cts.augmented.AugmentedLoginNotImportantForAutofillActivityTest
Test: manual verification with Dialer app

Change-Id: I041922874fac749f1f5d49793f1ad3e26cc345d6