Add Hearing devices related tools

* Use config_quickSettingsHearingDevicesRelatedToolName and config_quickSettingsHearingDevicesRelatedToolIcon to control what tools need to be shown here.
* If tool icon is not provided, will use icon in PackageManager instead.

Bug: 341648471
Test: atest HearingDevicesToolItemParserTest HearingDevicesDialogDelegateTest HearingDevicesToolItemListTest
Flag: com.android.systemui.Flags.hearing_devices_dialog_related_tools
Change-Id: I0827e38f858da2ad657c2840d0f017a3db29a29c