aaudio: cleanup logs and add counters to dumpsys

Counters will give us some history for AAudio.
Removed some unneeded logs.
Added log to help debug intermittent volume problem.

Bug: 64310586
Test: adb shell logcat
Test: adb shell dumpsys media.aaudio
Change-Id: I012361bb4d0d0bfdedfe5ceef856b59282c8d3f0
diff --git a/media/libaaudio/src/fifo/FifoBuffer.cpp b/media/libaaudio/src/fifo/FifoBuffer.cpp
index e6e7c8e..9b9744e 100644
--- a/media/libaaudio/src/fifo/FifoBuffer.cpp
+++ b/media/libaaudio/src/fifo/FifoBuffer.cpp
@@ -43,7 +43,7 @@
     int32_t bytesPerBuffer = bytesPerFrame * capacityInFrames;
     mStorage = new uint8_t[bytesPerBuffer];
     mStorageOwned = true;
-    ALOGD("capacityInFrames = %d, bytesPerFrame = %d",
+    ALOGV("capacityInFrames = %d, bytesPerFrame = %d",
           capacityInFrames, bytesPerFrame);
 }