[autotest] Add firmware build to test job keyvals.

The fwrw_build and fwro_build keyvals will be saved to tko_job_keyvals table.
wmatrix will read the builds from tko_job_keyvals.

BUG=chromium:519631
TEST=local test

Change-Id: I52298efd168854714834db8ccc33261e085311ad
Reviewed-on: https://chromium-review.googlesource.com/293813
Reviewed-by: Dan Shi <dshi@chromium.org>
Tested-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
diff --git a/server/cros/dynamic_suite/constants.py b/server/cros/dynamic_suite/constants.py
index 1a6d9fe..7f750b3 100644
--- a/server/cros/dynamic_suite/constants.py
+++ b/server/cros/dynamic_suite/constants.py
@@ -19,7 +19,8 @@
 
 # Job attribute and label names
 EXPERIMENTAL_PREFIX = 'experimental_'
-FW_RW_VERSION_PREFIX = 'fwrw-version:'
+FWRW_BUILD = 'fwrw_build'
+FWRO_BUILD = 'fwro_build'
 JOB_REPO_URL = 'job_repo_url'
 VERSION_PREFIX = 'cros-version:'
 BOARD_PREFIX = 'board:'
@@ -49,4 +50,4 @@
 GS_OFFLOADER_INSTRUCTIONS = '.GS_OFFLOADER_INSTRUCTIONS'
 GS_OFFLOADER_NO_OFFLOAD = 'no_offload'
 
-PARENT_JOB_ID = 'parent_job_id'
\ No newline at end of file
+PARENT_JOB_ID = 'parent_job_id'