Add a new API: checkSurveyAvailable

This change introduces a new API within SettingsIntelligence to enable
SettingsGoogle to identify available surveys for Pixel device users.
This API will be used by SettingsGoogle to determine if there are any
surveys available for a user to take.

Bug: 380346685
Flag: com.android.server.accessibility.enable_low_vision_hats
Test: atest SurveyFeatureProviderImplTest
Change-Id: Ia4e694b6c8a240af4422baff61386d9ee5ffc346