Begin reporting Test Discovery Agent metrics

Start running the Test Discovery Agent and reportings its results via
metrics. No changes to the actual build process yet.

Test: atest build_test_suites_test && atest optimized_targets_test
Bug: 372973116
Change-Id: I958e034985c41ede8d6a2700311a4dd6e7ac18ba
diff --git a/ci/build_context.py b/ci/build_context.py
index cc48d53..c7a1def 100644
--- a/ci/build_context.py
+++ b/ci/build_context.py
@@ -47,6 +47,9 @@
       self.is_test_mapping = False
       self.test_mapping_test_groups = set()
       self.file_download_options = set()
+      self.name = test_info_dict.get('name')
+      self.command = test_info_dict.get('command')
+      self.extra_options = test_info_dict.get('extraOptions')
       for opt in test_info_dict.get('extraOptions', []):
         key = opt.get('key')
         if key == 'test-mapping-test-group':