SystemUI:systemui crash when moving data.

    Make a screenshot,then change the sdcard to intrenal
    storage,when moving data to it the delete the screenshot
    make systemui crash.

    Data UIR is not exit,can't be delete,throw the exception.

    Change-Id: Id17a59ee0f4e4d87db316d6debceb75e35a0af3b
    CRs-Fixed: 1008698

Change-Id: I6e6cbcf4b7808cde5a3d5633da69f9d61b8bf859