Re-render wav files and update loudness using updated 22.2->9.1.6 matrix.

- Based on AOMediaCodec/iamf-tools@1a02a20ed3.

Author: felicialim

tests/test_000131.iamf

@@ -141,7 +141,7 @@ mix_presentation_metadata {
       }
       loudness {
         info_type_bit_masks: []
-        integrated_loudness: -3064
+        integrated_loudness: -3176
         digital_peak: -2928
       }
     }

tests/test_000131.textproto

@@ -172,7 +172,7 @@ mix_presentation_metadata {
       }
       loudness {
         info_type_bit_masks: []
-        integrated_loudness: -2951
+        integrated_loudness: -3056
         digital_peak: -1957
       }
     }