Bug 1571308 - Use error code from apilint. r=nalexander

Failures in apilint have a rule code so include that in the information from
the lint.

Differential Revision: https://phabricator.services.mozilla.com/D40578

--HG--
extra : moz-landing-system : lando

tools/lint/android/lints.py

@@ -92,7 +92,7 @@ def api_lint(config, **lintargs):
         for rule in ('compat_failures', 'failures'):
             for r in issues[rule]:
                 err = {
-                    'rule': rule,
+                    'rule': r['rule'] if rule == 'failures' else 'compat_failures',
                     'path': mozpath.relpath(r['file'], topsrcdir),
                     'lineno': int(r['line']),
                     'column': int(r.get('column') or 0),