Make intent eligible value work with feature type

- Quick Answers capability can be enabled as a Quick Answers feature or
  HMR feature. QuickAnswersState abstracts the underlying feature state
  by introducing FeatureType.
- This CL makes intent level eligible states adopt feature type param.

Bug: b:340628526
Test: chromeos_components_unittests --gtest_filter=*QuickAnswers*
Change-Id: I8f0a18755d386a052945f3db9dfb12175de60012
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5722011
Reviewed-by: Wes Okuhara <wesokuhara@google.com>
Commit-Queue: Yuki Awano <yawano@google.com>
Cr-Commit-Position: refs/heads/main@{#1339880}