Camera: iterate through all encoders for finding max video size

    const Size MAX_PREVIEW_SIZE = { MAX_PREVIEW_WIDTH, MAX_PREVIEW_HEIGHT };

    // Treat the H.264 max size as the max supported video size.

    MediaProfiles *videoEncoderProfiles = MediaProfiles::getInstance();

    int32_t maxVideoWidth = videoEncoderProfiles->getVideoEncoderParamByName(

                            "enc.vid.width.max", VIDEO_ENCODER_H264);

    int32_t maxVideoHeight = videoEncoderProfiles->getVideoEncoderParamByName(

                            "enc.vid.height.max", VIDEO_ENCODER_H264);

    const Size MAX_VIDEO_SIZE = {maxVideoWidth, maxVideoHeight};

    Vector<video_encoder> encoders = videoEncoderProfiles->getVideoEncoders();

    int32_t maxVideoWidth = 0;

    int32_t maxVideoHeight = 0;

    for (size_t i = 0; i < encoders.size(); i++) {

        int width = videoEncoderProfiles->getVideoEncoderParamByName(

                "enc.vid.width.max", encoders[i]);

        int height = videoEncoderProfiles->getVideoEncoderParamByName(

                "enc.vid.height.max", encoders[i]);

        // Treat width/height separately here to handle the case where different

        // profile might report max size of different aspect ratio

        if (width > maxVideoWidth) {

            maxVideoWidth = width;

        }

        if (height > maxVideoHeight) {

            maxVideoHeight = height;

        }

    }

    // This is just an upper bound and may not be an actually valid video size

    const Size VIDEO_SIZE_UPPER_BOUND = {maxVideoWidth, maxVideoHeight};

    res = getFilteredSizes(MAX_PREVIEW_SIZE, &availablePreviewSizes);

    if (res != OK) return res;

    res = getFilteredSizes(MAX_VIDEO_SIZE, &availableVideoSizes);

    res = getFilteredSizes(VIDEO_SIZE_UPPER_BOUND, &availableVideoSizes);

    if (res != OK) return res;

    // Select initial preview and video size that's under the initial bound and