Make da driver to handle some probably broken Android devices, returning

zero media and sector size instead of "Medium not present" error,
until some confirmation button is tapped on device.

sys/cam/scsi/scsi_da.c

@@ -1667,7 +1667,10 @@ dadone(struct cam_periph *periph, union ccb *done_ccb)
 			 * give them an 'illegal' value we'll avoid that
 			 * here.
 			 */
-			if (block_size >= MAXPHYS || block_size == 0) {
+			if (block_size == 0 && maxsector == 0) {
+				snprintf(announce_buf, sizeof(announce_buf),
+				        "0MB (no media?)");
+			} else if (block_size >= MAXPHYS || block_size == 0) {
 				xpt_print(periph->path,
 				    "unsupportable block size %ju\n",
 				    (uintmax_t) block_size);