[socket] Set CLOEXEC flag for fd in android_get_control_socket() am: 1569a26f0a am: 88523caf40

Original change: https://android-review.googlesource.com/c/platform/system/librustutils/+/2615173

Change-Id: I58962205645e97ecddfa28430f5b92eecc029fee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>