message: Fix strictNullCheck error from merge from 0.15
diff: @@ -202,9 +202,9 @@ export class SummaryManager extends EventEmitter implements IDisposable {
  private setClientId(clientId: string | undefined): void {
  this.clientId = clientId;
  if (clientId !== undefined) {
  - this.latestClientId = this.clientId;
  + this.latestClientId = clientId;
  if (this.runningSummarizer !== undefined) {
  - this.runningSummarizer.updateOnBehalfOf(this.latestClientId);
  + this.runningSummarizer.updateOnBehalfOf(clientId);
  }
  }
  }
  @@ -323,8 +323,10 @@ export class SummaryManager extends EventEmitter implements IDisposable {
  const runningSummarizerEvent = PerformanceEvent.start(this.logger,
  { eventName: "RunningSummarizer", attempt: this.startThrottler.attempts });
  this.runningSummarizer = summarizer;
  + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  + const clientId = this.latestClientId!;
  // eslint-disable-next-line @typescript-eslint/no-floating-promises
  - this.runningSummarizer.run(this.latestClientId).then(() => {
  + this.runningSummarizer.run(clientId).then(() => {
  runningSummarizerEvent.end();
  }, (error) => {
  runningSummarizerEvent.cancel({}, error);
  