What is the android: 
Note that this element does not declare a permission itself, only a category in which permissions can be placed. See the element for element for information on declaring permissions and assigning them to groups
Android and its Permission : 

• Android  is the platform where user can interact on the demand of his/her App
• Mostly android developer used different type of permission for their Apps
• On the demand of apps and its functionality permission are changes
• These permission access the property of built in function of Apps 
• having best quality of apps permission to enhance the quality of App.

 Privacy Policy : 

As most of the app used permission of the Camera class is used to set image capture settings, start/stop preview, snap pictures, and retrieve frames for encoding for video. This class is a client for the Camera service, which manages the actual camera hardware. 
To access the device camera, i declare the  CAMERA permission in your Android Manifest.For example, if you use the camera and auto-focus feature, your Manifest should include the following:

In Apps i used :

• To access the CAMERA for flashing
• used the light in torch light functionality
• For more/enhance light accelerate the hardware of camera in app

• Change Android Wallpaper Using Wallpaper Changer

• uses-feature android:name="android.software.live_wallpaper"
        android:required="true" /> 

• using this like command to declared permission in android manifest