[automerge] cameraserver: Fix convertToHidl for requestStreamBuffers return. 2p: 213a65c6fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/17385331

Bug: 225053638
Change-Id: Ic9958b32757d019726e7d3a99289eedb9f832427