Merge "Add a demo page in OTA_analyzer." am: ceadd4cff1 am: 4c11f8c6e0 am: 0a461d9383

Original change: https://android-review.googlesource.com/c/platform/development/+/1778765

Change-Id: I3c5b262dc3622c0c83835dd9c9f8e73d4b1455bf