[Chromecast] Allow recursive dependencies for cast_test_groups.
[Chromecast] Allow recursive dependencies for cast_test_groups.

Forward invoker dependencies such that a cast_test_group can depend on
another cast_test_group. Enforce these dependencies for the build steps
as well as the filter generation.

Bug: b/27303049
Test: Filters file is correct.

BUG=

Review URL: https://codereview.chromium.org/1776103003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#379923}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk