[ha_feedback] Add more history type data in HearingAidStatsLogUtils

* Add le_hearing, le_hearable paired type into history, so we can know if users stuck in paired stage.
* Ensure not to affect the HaTs survey user category
* Provide function to get latest user history type

Bug: 441317706
Test: atest HearingDeviceStatsLogUtilsTest
Flag: EXEMPT bugfix
Change-Id: I55713695097d4b4b10a406d9b818698281dfeaae