Merge "Additional checks for ModemActivityInfo.isValid()" into nyc-dev
am: f6496db8ce

* commit 'f6496db8cefe68b2d02fde22a68b84f7b5c86686':
  Additional checks for ModemActivityInfo.isValid()

Change-Id: Id4fb225d71e33bbfdf57dd13278fc71b4cd40370