73c3007c24
Merge from http://go/wvgerrit/47640 Test: unit/integration tests Bug: b/62058202 The usage table keeps track of license duration by using the current system time. However, if a user were to rollback the time, they can effectively continue offline playback indefinitely. This changes the way we compute time by computing offsets by which the user rollbacked the time and adding it to the current time. This change also includes a test to verify protection against rollback for usage entries that is only run when the user is root. Change-Id: I97c430e1443747b0f9759ae5390b8f5d06bdebf1