[CQ] migrate off deprecated Logger.error API

[pq]

Logger.error(object) is deprecated and the String API is preferred.

https://github.com/JetBrains/intellij-community/blob/8e46815dd140357c19061ceba77416d40d81866d/platform/util/src/com/intellij/openapi/diagnostic/Logger.java#L378

(This logging isn't awesome and maybe we'll revisit but at least the API calls are clean.)

Verifier output:

      #Deprecated method com.intellij.openapi.diagnostic.Logger.error(Object) invocation
          Deprecated method com.intellij.openapi.diagnostic.Logger.error(java.lang.Object message) : void is invoked in io.flutter.vmService.VmServiceWrapper$10.onError(RPCError) : void

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