DeskClock: Digital clock display incomplete when huge font size in chinese

When set huge font size, the widget can not display completely

Change widget label font size smaller.

CRs-Fixed: 689767

Change-Id: I236ea2d3a702bb895f19f25f6e477734a475e833
DeskClock: Fix crash when click the dismiss in the notification

Startactivity without new task flag will lead app crash. The Deskclock
will start activity from broadcast receiver, this action need add flag
FLAG_ACTIVITY_NEW_TASK

Add the flag of FLAG_ACTIVITY_NEW_TASK for startactivity in onreceive.

CRs-fixed: 690390

Change-Id: I3723a49892ff86b1f54d9ab4b90d8c39f04d0fe5
DeskClock: Fix the start icon color of stopwatch turn gray when rotate

The start icon default color for lanscape is not white, so the color look
like turn gray when rotate screen.

Modify the color of start icon to white for default.

CRs-fixed: 693830

Change-Id: Id8561a5825a42d0e58027adfadce006f5597a465