rework BinaryPushStateChanged atom

/*

 * Logs when a binary push state changes.

 * Logged in Play store

 * Logged by the installer via public api.

 */

message BinaryPushStateChanged {

    // Binary package name.

    optional string binary_name = 1;

    // Version code.

    optional int64 version = 2;

    // State

    // Name of the train.

    optional string train_name = 1;

    // Version code for a "train" of packages that need to be installed atomically

    optional int64 train_version_code = 2;

    // After installation of this package, device requires a restart.

    optional bool requires_staging = 3;

    // Rollback should be enabled for this install.

    optional bool rollback_enabled = 4;

    // Requires low latency monitoring if possible.

    optional bool requires_low_latency_monitor = 5;

    enum State {

        STATE_UNKNOWN = 0;

        DOWNLOAD_START = 1;

        DOWNLOAD_DONE = 2;

        INSTALL_START = 3;

        INSTALL_DONE = 4;

        REBOOT_START = 5;

        REBOOT_DONE = 6;

        UNKNOWN = 0;

        INSTALL_REQUESTED = 1;

        INSTALL_STARTED = 2;

        INSTALL_STAGED_NOT_READY = 3;

        INSTALL_STAGED_READY = 4;

        INSTALL_SUCCESS = 5;

        INSTALL_FAILURE = 6;

        INSTALL_CANCELLED = 7;

        INSTALLER_ROLLBACK_REQUESTED = 8;

    }

    optional State state = 3;

    optional State state = 6;

}

/** Represents USB port overheat event. */