Merge "Add more helpful debug information"

import com.android.internal.annotations.VisibleForTesting;

import com.android.server.location.ClientBrokerProto;

import java.util.Base64;

import java.util.Collections;

import java.util.HashSet;

import java.util.Iterator;

                result = ContextHubTransaction.RESULT_FAILED_UNKNOWN;

            }

        } else {

            Log.e(TAG, "Failed to send message to nanoapp: client connection is closed");

            String messageString = Base64.getEncoder().encodeToString(message.getMessageBody());

            Log.e(TAG, String.format(

                    "Failed to send message (connection closed): hostEndpointId= %1$d payload %2$s",

                    mHostEndPointId, messageString));

            result = ContextHubTransaction.RESULT_FAILED_UNKNOWN;

        }