Merge "Remove mentions of audio_policy.conf"

         * The WiFi radio must support WiFi P2P.

         * The WiFi radio must support concurrent connections to the WiFi display and

           to an access point.

         * The Audio Flinger audio_policy.conf file must specify a rule for the "r_submix"

           remote submix module.  This module is used to record and stream system

         * The Audio Server audio_policy_configuration.xml file must specify a rule for

           the "r_submix" remote submix module.  This module is used to record and stream system

           audio output to the WiFi display encoder in the media server.

         * The remote submix module "audio.r_submix.default" must be installed on the device.

         * The device must be provisioned with HDCP keys (for protected content).