[Dispatcher] fix loading default library for multiadapters
[Dispatcher] fix loading default library for multiadapters

Handle multiple adapters in the case of default DLL search mechanism:
1. Fixed loop exit when receiving MFX_ERR_NONE from LoadSelectedDLL() to continue handling other adapters.
2. Added mediaAdapterType filling for further correct sorting of adapters.

Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK