Add MediaRouterServiceTests to system server (media) postsubmit

Being in the postsubmit is a pre-requisite for adding it to the
presubmit, according to go/test-mapping-slo-guide.

Bug: 305199571
Change-Id: Ib39bf4db87fa8d662e59fbdac0a7b96072f24426
Test: n/a

1 files changed, 5 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/media/TEST_MAPPING b/services/core/java/com/android/server/media/TEST_MAPPING
index 1b49093a66d8..b3e5b9e96889 100644
--- a/services/core/java/com/android/server/media/TEST_MAPPING
+++ b/services/core/java/com/android/server/media/TEST_MAPPING
@@ -3,5 +3,10 @@
     {
       "name": "CtsMediaBetterTogetherTestCases"
     }
+  ],
+  "postsubmit": [
+    {
+      "name": "MediaRouterServiceTests"
+    }
   ]
 }