Restore downgrade logic of recreating schema

Crashing MP process on rollback or downgrade is not efficient as it
takes more than 30s for process to be started again. Recreating DB
schema takes less than a second and seems more cleaner approach.

Test: atest DatabaseHelperTest
Bug: 252718863
Change-Id: I98edd65a95e6cc831a52cb03316e72ed01510abb
2 files changed