Add US-MTV and TW TLs to media solutions OWNERS

This ensures that someone can approve emergency rollbacks and fixes
outside of LON hours for files exclusively owned by media
solutions, as configured in
https://android-review.git.corp.google.com/q/topic:%22media-playback-update-OWNERS%22.

Bug: 285890867
Test: None (OWNERS-only change)

Change-Id: I3d0877a1928d3dfc359e420751ada1a6ae7fb106
diff --git a/media/janitors/media_solutions_OWNERS b/media/janitors/media_solutions_OWNERS
index 95c2b97..004fa30 100644
--- a/media/janitors/media_solutions_OWNERS
+++ b/media/janitors/media_solutions_OWNERS
@@ -17,3 +17,8 @@
 
 # MediaRouter and native mirroring only:
 aquilescanta@google.com
+
+# Emergency rollbacks and fixes outside LON timezone
+jmtrivi@google.com # US-MTV
+lajos@google.com # US-MTV
+scottnien@google.com # TW-NTC