Add a utility class for logging

This class is copied from InCallUI.

The main advantage of using the utility class is that it uses string
formatters. This means that we can add verbose logging without the
overhead of string building. Verbose logging is needed for b/13172967

Bug: 13172967
Change-Id: I6955cafff0a61ddac842fa6b040d841b58ff9230
1 file changed
tree: b38ee4fddee160c440da81585788d12a9fac797b
  1. libs/
  2. res/
  3. src/
  4. tests/
  5. .classpath
  6. .project
  7. Android.mk
  8. AndroidManifest.xml