tree a79034ef1f705a19026cdb07a095d51d1a2d7d65
parent c456aab7e26ceaa8a322668122029c85a4eb4c31
author Zhomart Mukhamejanov <zhomart@google.com> 1544808992 -0800
committer Zhomart Mukhamejanov <zhomart@google.com> 1545072988 -0800

Add PrepareUpdateService.

It's moved from PrepareStreamingService intent service.
Now PrepareUpdateService takes an UpdateConfig and
builds PayloadSpec for UpdateEngine for both streaming
and non-streaming update.

It allows us to do all preparations in intent service's
thread, without blocking UI.

We will also add checksum verification to
PrepareUpdateService.

Test: device, junit
Bug: 77150191
Change-Id: I15c0bc58e3238bea6ea1c4f13063575e2def89c1
Merged-In: Iea69acd9aa41e17538c26aff60f7598093ca7744