Close the socket in socketCreateTest before exist

The testCgroupSocketCreateBlock test left some socket open when test
exist and might cause other net test flaky. This patch fix that before
the test exits.

Bug: 118753529
Test: ./all_test.sh
Change-Id: I88be0b49b2dfa001bfc4fea699f9bf714e4ec8e3
1 file changed
tree: 33aceb10faac70527275dd3b0a6586a977e02e53
  1. devicetree/
  2. net/
  3. Android.bp