Merge "Allow Camera.setDisplayOrientation to be called when preview is active."

    if (result != NO_ERROR) return result;

    if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) {

        // The orientation cannot be set during preview.

        if (mHardware->previewEnabled()) {

            return INVALID_OPERATION;

        }

        // Mirror the preview if the camera is front-facing.

        orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT);

        if (orientation == -1) return BAD_VALUE;

        if (mOrientation != orientation) {

            mOrientation = orientation;

            if (mPreviewWindow != 0) {

                native_window_set_buffers_transform(mPreviewWindow.get(),

                        mOrientation);

            }

        }

        return OK;

    } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) {