Fix missing group alertOverride recalculation

Bug: 185680162
Test: manual testing w/ telegram and whatsapp
Test: atest NotificationGroupAlertTransferHelperTest
Test: atest NotificationGroupManagerLegacyTest
Merged-In: I4447810af5e2a17c3b6841dfa5cd31703e5f334d
Change-Id: I4447810af5e2a17c3b6841dfa5cd31703e5f334d
(cherry picked from commit 457bab63923c84d13ba1abe6a5857e4a1dd0bd92)
1 file changed