Bootstrap the edit monitor project

Add basic files required for the edit monitor project.

The project aims to monitor file changes on Android source trees that are checked out to local disk and upload the edit event logs for post analysis. More details and design doc can be found in the bug.

Bug: b/365617369
Test: None
Change-Id: Ie5e2bdb0747823f200c87ebe071f5f9a2e567b46