[Android] Trim extraneous logging in the android test runner.

BUG=

Review URL: https://codereview.chromium.org/1704453002

Cr-Commit-Position: refs/heads/master@{#375584}
diff --git a/build/android/test_runner.py b/build/android/test_runner.py
index 0f7e2612..ca6fe41 100755
--- a/build/android/test_runner.py
+++ b/build/android/test_runner.py
@@ -973,6 +973,7 @@
   command = args.command
 
   ProcessCommonOptions(args)
+  logging.info('command: %s', ' '.join(sys.argv))
 
   if args.enable_platform_mode:
     return RunTestsInPlatformMode(args)