Merge "Implement IntoRawFd for ParcelFileDescriptor." am: 7e6ce05500 am: 3d25b57a77 am: 23dcfeb37d

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1827240

Change-Id: Id4dbaf1c90d6cd611e4dc3dcba51b020f0fdcb4e