DefaultContainerService: implement additional methods

For usage in Settings->Storage

Change-Id: I2d45198cc6ea3b84af1547873380eae2c04c0b93
input: Add workaround for broken hardware keyboard support

* Add workaround var for devices with broken kernels

Change-Id: Ib6ade70f399067469ba5aece48c6ec4608125d75