More source code Clean up in video editor engine

o fixed incorrect design and got rid of PreviewPlayerBase class
o removed obsolete/unused code as much as possible and reformatted the source code
o verified and passed functional tests
o More to come ...

Change-Id: I7a89162f8b9d9ea6eabcf0457366cd2f6d970d11
diff --git a/libvideoeditor/lvpp/VideoEditorPlayer.cpp b/libvideoeditor/lvpp/VideoEditorPlayer.cpp
index 8e66f73..fa2834a 100755
--- a/libvideoeditor/lvpp/VideoEditorPlayer.cpp
+++ b/libvideoeditor/lvpp/VideoEditorPlayer.cpp
@@ -201,7 +201,7 @@
         const media::Metadata::Filter& ids, Parcel *records) {
     using media::Metadata;
 
-    uint32_t flags = mPlayer->flags();
+    uint32_t flags = mPlayer->getSourceSeekFlags();
 
     Metadata metadata(records);