Merge "DO NOT MERGE: libcameraservice: Fix nullptr crash when no client." into mnc-dr-dev am: c0d8c35a2d am: 80ad49403e
am: 55a4d0bdf1  -s ours

* commit '55a4d0bdf185b0cf7e37ca0446e4e5046cef5534':
  DO NOT MERGE: libcameraservice: Fix nullptr crash when no client.