Trimming: switch to use sherlock action bar

Show a "done" instead of the icon according to the UX team.
And we don't have API level dependency.

bug:7093240

Change-Id: Ib331495dd233c4dcbeb3d587bd5a4d0d89039d49
diff --git a/gallerycommon/src/com/android/gallery3d/common/ApiHelper.java b/gallerycommon/src/com/android/gallery3d/common/ApiHelper.java
index cfdde15..45a859e 100644
--- a/gallerycommon/src/com/android/gallery3d/common/ApiHelper.java
+++ b/gallerycommon/src/com/android/gallery3d/common/ApiHelper.java
@@ -165,9 +165,6 @@
     public static final boolean CAN_START_PREVIEW_IN_JPEG_CALLBACK =
             Build.VERSION.SDK_INT >= VERSION_CODES.ICE_CREAM_SANDWICH;
 
-    public static final boolean HAS_MEDIA_MUXER =
-            Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN;
-
     public static int getIntFieldIfExists(Class<?> klass, String fieldName,
             Class<?> obj, int defaultVal) {
         try {