Update App handle education datastore when specific events occurs

Updates educationViewedTimestampMillis and featureUsedTimestampMillis to app handle education datastore whenever user views the education or expands app handle respectively.

Fixes: 369109780
Test: atest AppHandleEducationControllerTest
Test: atest AppHandleEducationDatastoreRepositoryTest
Flag: com.android.window.flags.enable_desktop_windowing_app_handle_education

Change-Id: Ib504957be030ae13cc9d22700aae3c9023f63064