Add touch classification metrics atom.

        AssistGestureStageReported assist_gesture_stage_reported = 174;

        AssistGestureFeedbackReported assist_gesture_feedback_reported = 175;

        AssistGestureProgressReported assist_gesture_progress_reported = 176;

        TouchGestureClassified touch_gesture_classified = 177;

    }

    // Pulled events will start at field 10000.

    optional float latency_stdev_micros = 4;

}

/**

 * Logs gesture classification and timing information for touch events.

 *

 * Logged from:

 *   frameworks/base/core/java/android/view/GestureDetector.java

 *   frameworks/base/core/java/android/view/View.java

 */

message TouchGestureClassified {

    // The source of the classification (e.g. Java class name).

    optional string source = 1;

    enum Classification {

        UNKNOWN_CLASSIFICATION = 0;

        SINGLE_TAP = 1;

        DOUBLE_TAP = 2;

        LONG_PRESS = 3;

        DEEP_PRESS = 4;

        SCROLL = 5;

    }

    // The classification of the gesture.

    optional Classification classification = 2;

    // The interval from the start of a touch event stream until the

    // classification was made.

    optional int32 latency_millis = 3;

    // The distance from the location of the first touch event to the

    // location of the touch event when the classification was made.

    optional float displacement_px = 4;

}

/**

 * Logs that a setting was updated.

 * Logged from: