Add AndroidManifest .expected files for trichrome/webview

This CL adds AndroidManifest.expected files for trichrome_chrome_apk,
trichrome_library_apk, system_webview_apk and trichrome_webview_apk.

Bug: 1048217
Change-Id: Id36ba4f88ba14125c8e0d14695dedda41199dbb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2156072
Commit-Queue: Henry Jian <hzjian@google.com>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762916}