Add support for analysis of OTA package.

payload.js defines a Class that could parse the OTA metadata from
an OTA package(.zip). PackageAnalysis.vue enable users to upload
their own OTA package for analysis. PayloadDetail.vue and
OperationDetail will display the metadata in a human-readable way.

The whole analysis process is done on frontend and no communication
with server is involved after loading the page.

Test: Mannual tested.
Change-Id: I3becba872f6564ec9e44edad3a6cc19eb0714ed6
13 files changed