It's official: From now on, all manufacturers that launch new devices running Android, Google system, should include the official system logo on the device boot screen.
According to Geek.com, Google is forcing manufacturers to include the logo, otherwise the devices will not have access to the company services. Like GooglePlay, for example. The goal so far everyone is unaware, but Google is presumed to want to maintain a visual identity of the system and make it easier for the user to identify whether or not your device runs Android. This is because many manufacturers create their own interfaces to the system, greatly modifying the original appearance of Android.
There are also guidelines on how this logo should be inserted into the screen, including size and exact position.

Some recent smartphones that have reached the market already display such a logo, including Samsung Galaxy S5 and HTC One M8.
Source: Geek.com
Route: AndroidCentral