Supporting change for device frame checkbox

Main change: https://android-review.googlesource.com/121390
Bug: https://code.google.com/p/android/issues/detail?id=82742

Change-Id: I887e9cfa9ad9637e67b7abe1b31a0147e1d3f195
diff --git a/sdklib/src/main/java/com/android/sdklib/internal/avd/AvdManager.java b/sdklib/src/main/java/com/android/sdklib/internal/avd/AvdManager.java
index 471dcae..e2f3acc 100644
--- a/sdklib/src/main/java/com/android/sdklib/internal/avd/AvdManager.java
+++ b/sdklib/src/main/java/com/android/sdklib/internal/avd/AvdManager.java
@@ -155,6 +155,13 @@
      * @see #NUMERIC_SKIN_SIZE
      */
     public static final String AVD_INI_SKIN_PATH = "skin.path"; //$NON-NLS-1$
+
+    /**
+     * AVD/config.ini key name representing the SDK-relative path of the skin folder to be selected if
+     * skins for this device become enabled.
+     */
+    public static final String AVD_INI_BACKUP_SKIN_PATH = "skin.path.backup"; //$NON-NLS-1$
+
     /**
      * AVD/config.ini key name representing an UI name for the skin.
      * This config key is ignored by the emulator. It is only used by the SDK manager or