Utility to format human-friendly durations.

Bug: 6777872
Change-Id: Ie7ebcb456306f4f88b4707030dd7beda3fc90368
Stop supplicant and dhcp before start

Bug: 7227463
Change-Id: Iaa0df7522edc38d25fae2bbda8d24490e997e733
Delete appWidgetId when removing lockscreen widgets

Change-Id: I06a01fd2255118fec8769034260f561dc7c640e1