aaudio: call validate() from readFromParcel()

This is to ensure that validate() is always called
in the future.

Bug: 74558178
Test: run AAudio CTS
Test: on Marlin, adb shell write_sine_callback -pl
Change-Id: I661f3c4e690be2268ca61b80a98bbdf9a7368c1b
diff --git a/media/libaaudio/src/binding/RingBufferParcelable.h b/media/libaaudio/src/binding/RingBufferParcelable.h
index bd562f2..1dbcf07 100644
--- a/media/libaaudio/src/binding/RingBufferParcelable.h
+++ b/media/libaaudio/src/binding/RingBufferParcelable.h
@@ -66,11 +66,12 @@
 
     aaudio_result_t resolve(SharedMemoryParcelable *memoryParcels, RingBufferDescriptor *descriptor);
 
-    aaudio_result_t validate();
-
     void dump();
 
 private:
+
+    aaudio_result_t validate() const;
+
     SharedRegionParcelable  mReadCounterParcelable;
     SharedRegionParcelable  mWriteCounterParcelable;
     SharedRegionParcelable  mDataParcelable;