Revert "atrace: Make atrace notify VR services of new trace sessions"

This reverts commit 213feb32c76bb4ed4262dad8c71f0377ee710fac.

Reason for revert: tracing & perf teams don't want to support PDX at this point in time.

Change-Id: I28b8a7c55c9d31c8469236fb60a6e034b1ef8af7
2 files changed