audio policy: add flag for call audio patch fixes

Bug: 292492229
Flag: EXEMPT flag creation
Test: make
Change-Id: I89de76a4813af19eb9b5c5002d2de379d802bfd6
diff --git a/media/audio/aconfig/audioserver.aconfig b/media/audio/aconfig/audioserver.aconfig
index 6f76408..39fa187 100644
--- a/media/audio/aconfig/audioserver.aconfig
+++ b/media/audio/aconfig/audioserver.aconfig
@@ -29,6 +29,14 @@
 }
 
 flag {
+    name: "fix_call_audio_patch"
+    namespace: "media_audio"
+    description:
+        "optimize creation and release of audio patches for call routing"
+    bug: "292492229"
+}
+
+flag {
     name: "fix_concurrent_playback_behavior_with_bit_perfect_client"
     namespace: "media_audio"
     description: