Allow missing method Javadocs for test classes in Checkstyle.

Bug: None
Test: Existing test_ShouldSkip will test this as it is using
      checkstyle.SKIPPED_RULES_FOR_TEST_FILES

Change-Id: I56c8c86a36f93b6b72a87fd97b75e5233fde9077

tools/checkstyle/checkstyle.py

@@ -34,7 +34,8 @@
 CHECKSTYLE_STYLE = os.path.join(MAIN_DIRECTORY, 'android-style.xml')
 FORCED_RULES = ['com.puppycrawl.tools.checkstyle.checks.imports.ImportOrderCheck',
                 'com.puppycrawl.tools.checkstyle.checks.imports.UnusedImportsCheck']
-SKIPPED_RULES_FOR_TEST_FILES = ['com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocTypeCheck']
+SKIPPED_RULES_FOR_TEST_FILES = ['com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocTypeCheck',
+                                'com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocMethodCheck']
 SUBPATH_FOR_TEST_FILES = ['/tests/java/', '/tests/src/']
 ERROR_UNCOMMITTED = 'You need to commit all modified files before running Checkstyle\n'
 ERROR_UNTRACKED = 'You have untracked java files that are not being checked:\n'