Add DIR_METADATA files to //components/media_router

Generate DIR_METADATA files and remove metadata from OWNERS files for
//components/media_router

Bug: 1113033
Change-Id: Ic399c177758d3fbfefa46b336080ed0091290793
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2545023
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#831953}

components/media_router/DIR_METADATA

+monorail {
+  component: "Internals>Cast"
+}
+team_email: "media-dev@chromium.org"
\ No newline at end of file

components/media_router/OWNERS

 mfoltz@chromium.org
 btolsch@chromium.org
 takumif@chromium.org
-
-# TEAM: media-dev@chromium.org
-# COMPONENT: Internals>Cast

components/media_router/browser/android/DIR_METADATA

+monorail {
+  component: "Internals>Cast"
+}
+team_email: "media-dev@chromium.org"
\ No newline at end of file

components/media_router/browser/android/OWNERS

@@ -5,6 +5,3 @@ tguilbert@chromium.org
 # backup reviewers
 mfoltz@chromium.org
 mlamouri@chromium.org
-
-# TEAM: media-dev@chromium.org
-# COMPONENT: Internals>Cast

components/media_router/browser/android/junit/src/org/chromium/components/media_router/OWNERS

 mfoltz@chromium.org
 mlamouri@chromium.org
 zqzhang@chromium.org
-
-# TEAM: media-dev@chromium.org
-# COMPONENT: Internals>Cast

components/media_router/test/android/OWNERS

 file://components/media_router/browser/android/OWNERS
-
-# TEAM: media-dev@chromium.org
-# COMPONENT: Internals>Cast