aaudio: cleanup logs and comments

This CL should not change any code behavior except for log text.
Mostly it removes redundant class names from the log.

Test: CTS nativemedia/aaudio
Change-Id: I6a6d01da080f536d5345f2b0deb32e92ed1e3d47
diff --git a/services/oboeservice/AAudioServiceEndpointShared.h b/services/oboeservice/AAudioServiceEndpointShared.h
index e3bd2c1..74cd817 100644
--- a/services/oboeservice/AAudioServiceEndpointShared.h
+++ b/services/oboeservice/AAudioServiceEndpointShared.h
@@ -30,8 +30,7 @@
 namespace aaudio {
 
 /**
- * This Service class corresponds to a Client stream that shares an MMAP device through a mixer
- * or an input distributor.
+ * This manages an internal stream that is shared by multiple Client streams.
  */
 class AAudioServiceEndpointShared : public AAudioServiceEndpoint {