Merge "Add log when starting external vibration." into sc-dev

/* static */

int AudioFlinger::onExternalVibrationStart(const sp<os::ExternalVibration>& externalVibration) {

    sp<os::IExternalVibratorService> evs = getExternalVibratorService();

    if (evs != 0) {

    if (evs != nullptr) {

        int32_t ret;

        binder::Status status = evs->onExternalVibrationStart(*externalVibration, &ret);

        if (status.isOk()) {

            ALOGD("%s, start external vibration with intensity as %d", __func__, ret);

            return ret;

        }

    }

    ALOGD("%s, start external vibration with intensity as MUTE due to %s",

            __func__,

            evs == nullptr ? "external vibration service not found"

                           : "error when querying intensity");

    return static_cast<int>(os::HapticScale::MUTE);

}