Modifies the code so that if the unwind fails, the code still prints
as much data as possible.
Also, for sibling threads, skip printing the maps and memory/code
since it's not likely to be very relevant.
Fix a few cases where extra space is at the end of lines.
Fix an inverted if statement that was checking the wrong condition.
Bug: 18816322
Bug: 20829534
(cherry picked from ab9e7dcef6)
Change-Id: If2d3a734724c23df4192f4dfc6bd69d6729fbc8d
b67b92f279