CRAS: iodev - Deprecate stable_id_new

StableDeviceIdNew was used to migrate the implementation
of stable device id.
This change does two things to clean this up:
(1) Point 'stable_id' to 'stable_id_new' in all iodevs
(2) Remove 'stable_id_new' in CRAS

User will not observe anything by this change, unless the
CrOS device never boot up since M57 having audio preferences
using old version of 'stable_id' values.

BUG=chromium:1008264
TEST=Hotplug audio devices of type USB, BT, HDMI and verify
the selection logic doesn't change.

Change-Id: I38f202eb2f77c596be86d6baea7ea58bf2b8f302
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/1836842
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Commit-Queue: Hsinyu Chao <hychao@chromium.org>
10 files changed