Here's A Glimpse Of What The Next Version Of Android Might Look Like
One of them is the letter "L" in the status bar, which could simply indicate that this is a new version of Android. Google has been going in alphabetical order with each new major version update and naming the builds after desserts. It started with Cupcake, followed by Doughnut, Eclair, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich, Jelly Bean, and KitKat. There's been speculation that the next version will be called Lollipop.
Image Source: Reddit (Doopl)
The images were plucked by Reddit user Doopl, who found the images in Google's Chromium Tracker, which has since been removed. In addition to the letter "L," both screenshots shows a bell icon in the upper right corner. It looks similar to the bell icon in the Chrome notification center. One user surmised it might be used to mute notifications, while another guessed that it could be for a Do Not Disturb mode.

Image Source: Reddit (Doopl)