- Add two sanity checks.

- Remove one unnecessary line.
- Clear the extendedData vector in DecryptHandle.

Change-Id: I2610c6d68f12d48cb69323a5eb2ae4b3b3e44dff

drm/common/IDrmManagerService.cpp

@@ -107,6 +107,7 @@ static void clearDecryptHandle(DecryptHandle* handle) {
         handle->decryptInfo = NULL;
     }
     handle->copyControlVector.clear();
+    handle->extendedData.clear();
 }
 
 int BpDrmManagerService::addUniqueId(int uniqueId) {