logcat: Add --regex option

You can now filter log output by a regex on the messages.

Test: New unit test passes
Bug: 27706081
Change-Id: Idfa637f62a25fb1b92e9b49b89572dff0fec6e08
3 files changed
tree: ff91b9b2f3babbe65bc605ca18ccf4d5cf558acf
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/