dumpsys: add --json option to media.audio_flinger.

Currently only extracting audio performance data.

Test: dumpsys media.audio_flinger --json
Bug: 68148948
Change-Id: If207e7e20683dcf8d8d5874417cd7466c78a5df0
diff --git a/services/audioflinger/Configuration.h b/services/audioflinger/Configuration.h
index ede8e3f..64bb426 100644
--- a/services/audioflinger/Configuration.h
+++ b/services/audioflinger/Configuration.h
@@ -27,7 +27,7 @@
 //#define AUDIO_WATCHDOG
 
 // uncomment to display CPU load adjusted for CPU frequency
-//#define CPU_FREQUENCY_STATISTICS
+#define CPU_FREQUENCY_STATISTICS
 
 // uncomment to enable fast threads to take performance samples for later statistical analysis
 #define FAST_THREAD_STATISTICS