Add the LoudnessCodecApi tests to presubmit

Wrongfully added with ag/25575058 a new presubmit tag for the new
LoudnessCodec tests. This was reverted. Merged with the existing
presubmit tests

Test: presubmit & atest LoudnessCodecApiTest
Bug: 298463873
Change-Id: I85a2d2c92f5a0353e875d224f85230eaef79f7b1
diff --git a/media/TEST_MAPPING b/media/TEST_MAPPING
index 8f5f1f6..4fbe9ee 100644
--- a/media/TEST_MAPPING
+++ b/media/TEST_MAPPING
@@ -48,9 +48,7 @@
         {"exclude-annotation": "androidx.test.filters.FlakyTest"},
         {"exclude-annotation": "org.junit.Ignore"}
       ]
-    }
-  ],
-  "postsubmit": [
+    },
     {
       "file_patterns": [
         "[^/]*(LoudnessCodec)[^/]*\\.java"