Add test for DriverManager.getConnection() am: aa9807c512

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/apache-harmony/+/18235482

Change-Id: Ic528c45efe7564463f8c738ed6aa3245c1f70779
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>