Android 5.0 (dubbed Android L) is expected to be largest and most complex update ever performed on the Google-owned mobile operating system. In fact, the Mountain View company even released a developer preview version of the upcoming OS to help smooth over the transition for developers. We still don’t know which devices will receive the Android 5.0 update, but several credible sources are saying Samsung is planning to roll out Android 5.0 to its Galaxy S5 flagship smartphone and Galaxy Note 4 “phablet.” There’s on major hurdle that Samsung most cross in order to use Android 5.0 L on the Galaxy S5 and Galaxy Note 4: creating an environment in which the new Android 5.0 L OS is compatible with its own signature TouchWiz user interface. Samsung’s TouchWiz UI is a skin that’s applied to the devices’ OS, which could trigger some compatibility problems with the new version of Android is released. Samsung is known for dragging its feet when it comes to providing updates; however, analysts are optimistic that it will provide a timely update to the Galaxy S5 and Galaxy Note 4 when Android 5.0 L is finally released. Assuming they are able to create a stable, compatible…