Created the Unreliable Volume DatabaseHelper class

Bug: 193894998
Test: atest UnreliableVolumeTest

Change-Id: I2d5c60508a7501886b54d89a345c81572a133223
Merged-In: I2d5c60508a7501886b54d89a345c81572a133223
(cherry picked from commit 0129947c7fc9d7cc98476df975183e74347db57f)
2 files changed