Flounder audio policy: has speaker DRC

Add flag in audio policy configuration to declare that this
 device uses DRC on its speaker output.

Bug 15318604

Change-Id: I52f9d48fa256fa699faf97b787a9e18e82d64d2b
diff --git a/audio_policy.conf b/audio_policy.conf
index 7bb538d..3535451 100644
--- a/audio_policy.conf
+++ b/audio_policy.conf
@@ -10,6 +10,7 @@
   attached_output_devices AUDIO_DEVICE_OUT_SPEAKER
   default_output_device AUDIO_DEVICE_OUT_SPEAKER
   attached_input_devices AUDIO_DEVICE_IN_BUILTIN_MIC
+  speaker_drc_enabled TRUE
 }
 
 # audio hardware module section: contains descriptors for all audio hw modules present on the