Android: Treat "fatal" messages error output

If you trigger a fatal signal e.g. dividing by 0, you'll get a message
with an "F/" prefix. That should be red, too, just like "E/" and "W/".

Change-Id: I8bef7ebf4e8c7d7ac3794750306073043852634b
Reviewed-by: Daniel Teske <daniel.teske@digia.com>