Fix build error.

Original name INFINITY conflicts with the macro in math.h.

Change-Id: I9845ed84fca17813dd971239a902cc1e0bad1e3e
diff --git a/include/camera/CameraParameters.h b/include/camera/CameraParameters.h
index 19b052b..20eef72 100644
--- a/include/camera/CameraParameters.h
+++ b/include/camera/CameraParameters.h
@@ -243,7 +243,7 @@
     static const char TRUE[];
 
     // Value for KEY_FOCUS_DISTANCES.
-    static const char INFINITY[];
+    static const char FOCUS_DISTANCE_INFINITY[];
 
     // Values for white balance settings.
     static const char WHITE_BALANCE_AUTO[];