John Wang a48dc39bd5 Add hangupForegroundResumeBackground().
To fix bug 2968310.

Handle the operation of hangupForegroundResumeBackground while foreground call and background call come from different phones.

Change-Id: Id83ca1b75031a8391c95c7f8b2be40e9067dd4cd
2010-09-08 15:50:57 -07:00
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