audiopolicy: enable deep buffer output by default for music streams

 -By default return true for property audio.deep_buffer.media to
  use deep buffer output for music streams

Change-Id: I6303c6bcc949274d862a5de5d982d32c52108b76
diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index 2791b6d..1d2cb8f 100644
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -1372,7 +1372,7 @@
         flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
     } else if (/* stream == AUDIO_STREAM_MUSIC && */
             flags == AUDIO_OUTPUT_FLAG_NONE &&
-            property_get_bool("audio.deep_buffer.media", false /* default_value */)) {
+            property_get_bool("audio.deep_buffer.media", true/* default_value */)) {
         flags = (audio_output_flags_t)AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
     }