Remove android.hardware.Camera.CAMERA_ID_DEFAULT.

bug:3173302
Change-Id: I2141456f3577e504e173a46efdbb343e03aaa5f5
diff --git a/src/com/android/camera/CameraSettings.java b/src/com/android/camera/CameraSettings.java
index f4f27e6..600575e 100644
--- a/src/com/android/camera/CameraSettings.java
+++ b/src/com/android/camera/CameraSettings.java
@@ -380,8 +380,7 @@
     }
 
     public static int readPreferredCameraId(SharedPreferences pref) {
-        String id = Integer.toString(android.hardware.Camera.CAMERA_ID_DEFAULT);
-        return Integer.parseInt(pref.getString(KEY_CAMERA_ID, id));
+        return Integer.parseInt(pref.getString(KEY_CAMERA_ID, "0"));
     }
 
     public static void writePreferredCameraId(SharedPreferences pref,