Initial draft of smart folder logging to clearcut pipeline.

* Adds additional fields to launcher_log.proto to capture smart folder related information.
* Uses ProtoLite to generate log object using builder pattern and converts to nano version before writing to clearcut. Hence not making drastic change to existing logging pattern.

Change-Id: I89b10da8d4e35e3abc7ddb553046946f91b43445
6 files changed