Bring screenshot back to bugreport

Since the key cord for screen shot is now strictly enforced, we no
longer get a free screen shot with bugreport. This change to bugreport
script will capture a screen shot first, then proceed to dumpstate.
SendBug is also updated accordingly to take 2 parameters: one for
bugreport path, the other for screen shot path.

Change-Id: I20fcea2f3a207b0dcd5341c8646c694dac12ec54
2 files changed