aaudio: improve logging to help debugging

Use __func__ more often.
Show thread entry and exit.
Log illegal state transitions.
Remove some unnecessary logs.

Bug: 64310586
Test: use AAudio then look at the logs
Change-Id: I2e289698efc897640588ba534b5513ac39b15043
diff --git a/services/oboeservice/AAudioServiceEndpointShared.h b/services/oboeservice/AAudioServiceEndpointShared.h
index 74cd817..227250c 100644
--- a/services/oboeservice/AAudioServiceEndpointShared.h
+++ b/services/oboeservice/AAudioServiceEndpointShared.h
@@ -54,12 +54,13 @@
 
     virtual void            *callbackLoop() = 0;
 
+
+protected:
+
     AudioStreamInternal *getStreamInternal() const {
         return mStreamInternal;
     };
 
-protected:
-
     aaudio_result_t          startSharingThread_l();
 
     aaudio_result_t          stopSharingThread();