Move src/trace/flickerlib -> src/flickerlib

The module flickerlib/common.js is going to import features not
strictly related to trace objects / domain objects, hence let's
move it out of the src/trace package.

Bug: b/284424874
Test: npm run test:all
Change-Id: I099b11a2891b1fc9f1eb3dc334d55ba7ed01c287
55 files changed