Fix missing group alertOverride recalculation

Bug: 185680162
Test: manual testing w/ telegram and whatsapp
Test: atest NotificationGroupAlertTransferHelperTest
Test: atest NotificationGroupManagerLegacyTest
(cherry picked from commit 457bab63923c84d13ba1abe6a5857e4a1dd0bd92)
(cherry picked from commit aa6a7754ea82ffe72b9f601997d2e9297d03f786)
(cherry picked from commit 38d57ffe4aae7393c830cccf1b01c55880cf3700)
Merged-In: I4447810af5e2a17c3b6841dfa5cd31703e5f334d
Change-Id: I4447810af5e2a17c3b6841dfa5cd31703e5f334d
1 file changed