Capture input dispatcher's last ANR state in bug report.

Some ANR bugs are very difficult to localize because by the time
the bug report has been captured, the relevant information is
gone.  Work around this by capturing a log of the input dispatcher's
state at the exact time of the ANR before anything has changed
and include this information in the bug report.

Also fixed a nit related to some format strings that had
improper field widths specified.

Bug: 6680398
Change-Id: I5323bf18ec5e47a767cd053209753cc46852bf4c