Fixed crash when receiving ETWS message

Bug: 144139977
Test: CellBroadcastServiceTest
Merged-In: Icfbf6d0aacb0a1027d1f3cc2e3aafacde24d0698
Change-Id: Icfbf6d0aacb0a1027d1f3cc2e3aafacde24d0698
(cherry picked from commit 35a054022108156e5b641becaeee34b5b8157527)
1 file changed