Add Transcode CTS tests to mainline presubmit.

Bug: 190156985
Bug: 185553751
Test: atest
Change-Id: I4c6e0782efc107a56315cc1a1ef3a9e1becab958
diff --git a/TEST_MAPPING b/TEST_MAPPING
index f1d99be..46e36fc 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -4,13 +4,16 @@
             "name": "MediaProviderTests[com.google.android.mediaprovider.apex]"
         },
         {
-            "name": "CtsScopedStorageCoreHostTest"
+            "name": "CtsScopedStorageCoreHostTest[com.google.android.mediaprovider.apex]"
         },
         {
-            "name": "CtsScopedStorageHostTest"
+            "name": "CtsScopedStorageHostTest[com.google.android.mediaprovider.apex]"
         },
         {
-            "name": "CtsScopedStorageDeviceOnlyTest"
+            "name": "CtsScopedStorageDeviceOnlyTest[com.google.android.mediaprovider.apex]"
+        },
+        {
+            "name": "CtsMediaProviderTranscodeTests[com.google.android.mediaprovider.apex]"
         }
     ],
     "presubmit": [