ANR: Reduce native-PC width to 8 characters.

Reduce output verbosity so that more useful data fits in ANR.

The native-PC is relative, which means that even on 64-bit arch,
only 8 characters are always sufficient.

Bug: 189881220
Test: Manually trigger ANR and check output.
Change-Id: I294313444f4594528acc82a287b623425b270216
1 file changed