aaudio:  validate audio data format

Also lots of minor cleanup
Fix underscores in some headers
Refactor getTimestamp()

Bug: 34127069
Bug: 38227780
Test: CTS test_aaudio.cpp
Change-Id: I6fdb50eb00a41688df871018ced91d5f5f055f8a
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/media/libaaudio/src/binding/IAAudioService.h b/media/libaaudio/src/binding/IAAudioService.h
index 2cee651..44a5e12 100644
--- a/media/libaaudio/src/binding/IAAudioService.h
+++ b/media/libaaudio/src/binding/IAAudioService.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef BINDING_IAAUDIOSERVICE_H
-#define BINDING_IAAUDIOSERVICE_H
+#ifndef ANDROID_AAUDIO_IAAUDIO_SERVICE_H
+#define ANDROID_AAUDIO_IAAUDIO_SERVICE_H
 
 #include <stdint.h>
 #include <utils/RefBase.h>
@@ -103,4 +103,4 @@
 
 } /* namespace android */
 
-#endif //BINDING_IAAUDIOSERVICE_H
+#endif //ANDROID_AAUDIO_IAAUDIO_SERVICE_H