Merge "Add human-readable state int to PlaybackState"

    @Override

    public String toString() {

        StringBuilder bob = new StringBuilder("PlaybackState {");

        bob.append("state=").append(mState);

        bob.append("state=")

                .append(getStringForStateInt(mState))

                .append("(")

                .append(mState)

                .append(")");

        bob.append(", position=").append(mPosition);

        bob.append(", buffered position=").append(mBufferedPosition);

        bob.append(", speed=").append(mSpeed);

        }

    };

    /** Returns a human readable string representation of the given int {@code state} */

    private static String getStringForStateInt(int state) {

        switch (state) {

            case STATE_NONE:

                return "NONE";

            case STATE_STOPPED:

                return "STOPPED";

            case STATE_PAUSED:

                return "PAUSED";

            case STATE_PLAYING:

                return "PLAYING";

            case STATE_FAST_FORWARDING:

                return "FAST_FORWARDING";

            case STATE_REWINDING:

                return "REWINDING";

            case STATE_BUFFERING:

                return "BUFFERING";

            case STATE_ERROR:

                return "ERROR";

            case STATE_CONNECTING:

                return "CONNECTING";

            case STATE_SKIPPING_TO_PREVIOUS:

                return "SKIPPING_TO_PREVIOUS";

            case STATE_SKIPPING_TO_NEXT:

                return "SKIPPING_TO_NEXT";

            case STATE_SKIPPING_TO_QUEUE_ITEM:

                return "SKIPPING_TO_QUEUE_ITEM";

            default:

                return "UNKNOWN";

        }

    }

    /**

     * {@link PlaybackState.CustomAction CustomActions} can be used to extend the capabilities of

     * the standard transport controls by exposing app specific actions to