camera: add more htc parameters

Google Edition

Change-Id: I67968ea749dec0bf3810110f99bccdd3edee3428
diff --git a/camera/CameraParameters.cpp b/camera/CameraParameters.cpp
index 51e7e2a..7760832 100644
--- a/camera/CameraParameters.cpp
+++ b/camera/CameraParameters.cpp
@@ -226,6 +226,7 @@
 const char CameraParameters::KEY_GPU_EFFECT_PARAM_1[] = "GE-param1";
 const char CameraParameters::KEY_GPU_EFFECT_PARAM_2[] = "GE-param2";
 const char CameraParameters::KEY_GPU_EFFECT_PARAM_3[] = "GE-param3";
+const char CameraParameters::KEY_FORCE_USE_AUDIO_ENABLED[] = "forceuseaudio";
 #endif
 
 const char CameraParameters::TRUE[] = "true";