Extend rollback life time duration from 14 days to 60 days.

The rollback life time duration will be retained for 60 days for adb/server
side-triggering. The on device automatic rollback is now controlled by
different parameter (see ag/33292131).

Test: presubmit
Bug: 416259905
Flag: android.crashrecovery.flags.extend_rollback_lifetime
Change-Id: I10f449f1700c376e29c94768acb289f0e9871b13