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This sets HW secure codecs and and identifier as required if
we are configured for the L1 ChromeOS Factory Daemon CDM. It
then selects that CDM if the configuration specifies HW
secure codecs and allows a distinct identifier.

BUG=b:153111783
TEST=HW_SECURE_* use L1 CDM, otherwise L3

Change-Id: Ia2b4cfeace38755f1b823a8f15ff0cf325fde29b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625817Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Commit-Queue: Jeffrey Kardatzke <jkardatzke@google.com>
Cr-Commit-Position: refs/heads/master@{#843234}