code: @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
      public static boolean hasCameraFeatureAtLeastOne(PackageManager manager) {
          return manager.hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
      }
docs: Checks if the device has at least one camera.
  @param manager the package manager.
  @return {@code true} if the device has at least one camera.