This change updates the getSocket calls to getFileDescriptor, persuant
to new API.
Bug: 72473753
Test: CTS tests run on walleye
Merged-In: I65479cb35c88aee1f65c8597c3382cd30fa8d4a9
Change-Id: I65479cb35c88aee1f65c8597c3382cd30fa8d4a9
(cherry picked from commit 94d33818769cf60b9801b39875f5bc5dff2dc734)