CRAS alsa_io: Init device setting when set as default.
CRAS alsa_io: Init device setting when set as default.

BUG=chromium-os:36309
TEST=Manual test on Lumpy. restart cras, cras_test_client --dump_server_info
should see capture volume range of default device instead of -50/50

Change-Id: If375cd89c1d8c06f4db65e6c4502cf6546319190
Reviewed-on: https://gerrit.chromium.org/gerrit/38110
Reviewed-by: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>
Commit-Ready: Hsinyu Chao <8b91762bdbe27d3121b311091d7ca5125e9a8df6@chromium.org>
Tested-by: Hsinyu Chao <8b91762bdbe27d3121b311091d7ca5125e9a8df6@chromium.org>

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