Add Dolby TrueHD audio format

Bug: 30024357
Change-Id: I2ca8d24e9b9b053a42e1bcf3802fdf866f82053d
diff --git a/audio/include/system/audio.h b/audio/include/system/audio.h
index 2d9839e..b81b379 100644
--- a/audio/include/system/audio.h
+++ b/audio/include/system/audio.h
@@ -316,6 +316,7 @@
     AUDIO_FORMAT_DTS_HD              = 0x0C000000UL,
     // IEC61937 is encoded audio wrapped in 16-bit PCM.
     AUDIO_FORMAT_IEC61937            = 0x0D000000UL,
+    AUDIO_FORMAT_DOLBY_TRUEHD        = 0x0E000000UL,
     AUDIO_FORMAT_MAIN_MASK           = 0xFF000000UL, /* Deprecated. Use audio_get_main_format() */
     AUDIO_FORMAT_SUB_MASK            = 0x00FFFFFFUL,
 
@@ -1442,6 +1443,7 @@
     case AUDIO_FORMAT_DTS:
     case AUDIO_FORMAT_DTS_HD:
     case AUDIO_FORMAT_IEC61937:
+    case AUDIO_FORMAT_DOLBY_TRUEHD:
         return true;
     default:
         return false;