[zip] Set all entry times before 1980 to 1980-01-01

Before this change, entry times before 1980 had the year changed to 1980
but the month/day/hour/minutes/seconds were all kept as-is.

Bug: 277978832
Test: atest zipalign_tests
Change-Id: I9f87e98a6b985002578490b87c654fee86c65d62