5/ Show Flicker properties on Winscope (WM)

- Use flicker object on the property tree
- Keep `proto` entry on the property tree with the original proto file
- Use `prettyPrint` method on flicker to format output for winscope

Bug: 185516271
Test: build winscope and open WM traces
Change-Id: I1c9f1a106b82f487b78d1b386cc091d21715e04d
13 files changed