Enable RESTRICTED bucket.

Also reduce the minimum time delay to enter the bucket to 4 hours. The
current default remains 30 days.

Bug: 183103253
Test: atest AppStandbyControllerTests
Test: atest CtsJobSchedulerTestCases
Test: atest CtsUsageStatsTestCases:UsageStatsTest
Change-Id: I2171ad0b6fcad6c79b480582437fe1c0fd3df3b5