Added CMAS/ETWS duplicate expiration support

Now message duplication detection will only look back messages
for 24 hours by default for all countries, except 1 hour in
Japan.

Test: runtest -x packages/apps/CellBroadcastReceiver/tests/unit

bug: 31171149
Change-Id: I6765c9cebdb3bd9ab6d065f10acbd66047a34d8c