tree e6cc440b85340109aefb937843512c55f1ef0db8
parent ecb6d5648dd898ce61749fc4d59f38c373359bc7
author Mark Salyzyn <salyzyn@google.com> 1431705718 -0700
committer Mark Salyzyn <salyzyn@google.com> 1433431649 -0700

liblog: logcat: Add printable format modifier

- added printable format modifier:
  logcat -v printable
- opencoded borrowed individual utf8 validity checking algorithm
  from utf8_length() in libutils/Unicode.cpp
- if considered basic one-character ASCII, use popular \x escape
  sequences for non-printable
- logprint convert to C comments to drop mixed-mode

Bug: 19000361
Change-Id: I122a5b8fb41216fc0bc816178c0b768f3df56586