Add minimized status setting for async group header and rename parameters

Add minimized status setting for async group header, this fixes the test failures that is related with setting Sensitive status of Notification rows.

Previously, we use the term: low priority to refer to the minimized notifications because of history reason. Now the definitions of low priority notifications and minimized notifications are different, so we rename the parameter names that have lowPriority with minimized to reduce the confusion and improve code quality.

Bug: 217799515
Test: atest
      PlatformScenarioTests:MinPriorityGroupNotificationRowInflation
      atest
      PlatformScenarioTests:AutoGroupingNotificationInflation
      atest
      PlatformScenarioTests:ConversationGroupNotification
Flag: ACONFIG notification_async_group_header_inflation DEVELOPMENT
Change-Id: I30b36920df21f834028bb45a9742d0b4ccd65b42