Use tls 1.3 by default in TestSSLContext.

Due to the whole test update and revert thing that happened, some tests seemingly haven't been updated to expect 1.3 by default as it should be (see bug), so this cherrypick should help.

Test: URLConnectionTest
Test: m
(cherry picked from https://android-review.googlesource.com/q/commit:c47e33ff55335db45afbfab60bb2c0e248b27a57)
Bug: 291901467
Merged-In: I09d3297f64711c830957ea523a95740db208e047
Change-Id: I09d3297f64711c830957ea523a95740db208e047
2 files changed