CSD: notify when RS2 momentary exposure is reached

RS2 is defined in IEC 62368-1 3rd edition as 100dBA. Added however the
possibility to further restrict this value as part of the momentary
exposure API.

Test: UT and manual tests
Bug: 256616352
Change-Id: I004a620e5e7915824d390f7ddc41c16f9675d45a
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index a7028ee..8bf629b 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -1091,8 +1091,7 @@
                     return INVALID_OPERATION;
                 }
 
-                void startMelComputation(const sp
-                             <audio_utils::MelProcessor::MelCallback>& callback);
+                void startMelComputation(const sp<audio_utils::MelProcessor>& processor);
                 void stopMelComputation();
 
 protected: