[RESTRICT AUTOMERGE] Fix leaf certificate for download manager test

In P (And now O) we now require SANs be present, add one to the certificate for
localhost.

Bug: 176447348
Bug: 176958522
Fixes: 72099911
Test: atest CtsNetSecConfigDownloadManagerTestCases
Change-Id: Ide5aae9b06b1e1310634eb230c322c39cac8a37c
Merged-In: Ide5aae9b06b1e1310634eb230c322c39cac8a37c
(cherry picked from commit 5dba996c724986f617186cbf11218fe8a2ce653c)
1 file changed