What are the hidden features of Android M?
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At Google I/O 2 Google I/O on May 28, 2015 , Android M was unveiled . Android M is Google's next Android operating system. The Android "M" developer preview was released on May 28, 2015 for the Nexus 5 and Nexus 6 phones, the Nexus 9 tablet, and the Nexus Player set-top box, under the build number MPZ44Q . I want to now what are the hidden features of Android M.