Camera1: Fix enable shutter sound command error handling.

Return the error codes from calls to enableShutterSound to the caller,
and don't call the HAL with the enable shutter sound command.

Change-Id: Ibe4943bd1cd0fcd1832fd904f12dd2f78fec06a5
diff --git a/services/camera/libcameraservice/CameraClient.cpp b/services/camera/libcameraservice/CameraClient.cpp
index 562384d..c9c816a 100644
--- a/services/camera/libcameraservice/CameraClient.cpp
+++ b/services/camera/libcameraservice/CameraClient.cpp
@@ -608,11 +608,9 @@
     } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) {
         switch (arg1) {
             case 0:
-                enableShutterSound(false);
-                break;
+                return enableShutterSound(false);
             case 1:
-                enableShutterSound(true);
-                break;
+                return enableShutterSound(true);
             default:
                 return BAD_VALUE;
         }