Add support for non-A/B OTA package in OTA_analysis.

The non-A/B OTA package has a very different file system compared with
an OTA package. However, our OTA_analysis tool is based on the
update_metadata.proto. What we do here is try to convert the non-A/B OTA
package information, into a standard update_metadata.proto formated
manifest. The format and how the conversion works can be found in this
document:
https://docs.google.com/document/d/e/2PACX-1vRwMRodq4TCvTPEmlU6KL9vPSeFmEJjVXzq4PHhrB8tGy6oHFDJGCk3bIDA5Uv-4UEP0stLarBlhl2c/pub

In this CL, most of the information is successfully parsed, except
installation ops like stash, free, bsdiff, imgdiff, move. (anything
related to stash is not yet implemented)

Test: test by selecting a non-A/B OTA package.
Change-Id: I298f238395478422daece47cedbaa52a976d9f4c

tools/ota_analysis/src/components/PartitionDetail.vue

@@ -3,9 +3,6 @@
   <p v-if="partition.estimateCowSize">
     <strong> Estimate COW Size: </strong> {{ partition.estimateCowSize }} Bytes
   </p>
-  <p v-else>
-    <strong> Estimate COW Size: </strong> 0 Bytes
-  </p>
   <div
     class="toggle"
     @click="toggle('showInfo')"
@@ -30,7 +27,7 @@
         </strong>
         {{ partition.newPartitionInfo.size }} Bytes
       </li>
-      <li>
+      <li v-if="partition.newPartitionInfo.hash">
         <strong>
           New Partition Hash:
         </strong>