AppWidget: Make widget update quickly

Can't display the Power control widget after power on DUT for
3 mins. Because of the  update intent is received after power
on DUT for 3 mins.

Set the intent to foregound

CRs-Fixed: 707605

Change-Id: I5418c84a7dc79466be7a30bb3672ea41976badb0
Merge "AppWidget: Make widget update quickly" into du44