Revert "CameraMetadata: Add trace points CameraMetadata operations"

This reverts commit 47cdcf39.

Reason for revert: Each ATRACE_CALL operation has around 10us of perf cost. For cases
like 240fps recording, each removeInFlightMapEntry operation, on an
average has 20-30 CameraMetadata constructions, costing us .2 - .3ms in
latency. This is around 6% of the ~4ms budget that we have.

According to
https://source.android.com/setup/develop/new-device#build-variants

'Any debugging features that are enabled by default in userdebug should
be clearly defined and shared with all developers working on the
project. You should enable debugging features only on a limited-time
basis until the issue you're trying to debug is resolved'.

Reverting this change now that http://b/144028609

 has been resolved.

Bug: 155910869

Test: builds
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
Change-Id: I56e471a83097527a1a211c61c3bd73136a82b6b6