How to control your Android phone with your face

We've been exploring unconventional ways to control your favorite Android device with physical gestures — y'know, real-world movements like shaking and flipping the thing in a variety of specific ways.But get this: Android also has the ability to let you interact with your phone by simply moving your face.I kid you not: A cursory glance to the left with your pretty little peepers could take the place of the typical Android Back gesture. An upward glance could open your notifications. And