Add loudness enhancer effect

Bug 8413913

Change-Id: I546d5790f03a000c1343c08fb9ed22425a1ee680
diff --git a/audio_effects.conf b/audio_effects.conf
index aa1264b..9479e65 100644
--- a/audio_effects.conf
+++ b/audio_effects.conf
@@ -21,6 +21,9 @@
   downmix {
     path /system/lib/soundfx/libdownmix.so
   }
+  loudness_enhancer {
+    path /system/lib/soundfx/libldnhncr.so
+  }
 }
 
 # list of effects to load. Each effect element must contain a "library" and a "uuid" element.
@@ -91,6 +94,10 @@
     library audience_pre_processing
     uuid 08fa98b0-0b56-11e2-892e-0800200c9a66
   }
+  loudness_enhancer {
+    library loudness_enhancer
+    uuid fa415329-2034-4bea-b5dc-5b381c8d1e2c
+  }
 }
 # Audio preprocessor configurations.
 # The pre processor configuration consists in a list of elements each describing