Add streaming verification path.

+add an option to test verification path in CTS
+fix for verification timeout
+fix for checksum API for package verifiers

Bug: 204810986
Fixes: 204810986
Test: atest PackageManagerShellCommandTest ChecksumsTest
Change-Id: I1b24c601cf139d689b17d0f17d9a2ce139088386
10 files changed