Add checks for invalid parameters

Part of VTS test suite validation for
the binderized Widevine service

Test: Drm VTS test

bug:32815560
Change-Id: I0913c0e72487b5fdbf579b9ea3409c13264888fd

libwvdrmengine/mediacrypto/src_hidl/WVCryptoPlugin.cpp

@@ -83,6 +83,9 @@ Return<void> WVCryptoPlugin::notifyResolution(
 
 Return<Status> WVCryptoPlugin::setMediaDrmSession(
     const hidl_vec<uint8_t>& sessionId) {
+  if (sessionId.size() == 0) {
+    return Status::BAD_VALUE;
+  }
   const std::vector<uint8_t> sId = toVector(sessionId);
   CdmSessionId cdmSessionId(sId.begin(), sId.end());
   if (!mCDM->IsOpenSession(cdmSessionId)) {