tree cce3ff747ef80baf0336a3b1b1b1ad4a11d95de2
parent d5c7fb5e6efb98a4b8072be3c1e7e505b3344466
author Zhomart Mukhamejanov <zhomart@google.com> 1544808992 -0800
committer Zhomart Mukhamejanov <zhomart@google.com> 1544828842 -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: Iea69acd9aa41e17538c26aff60f7598093ca7744