cronet: rename CronetCtsTestServer to HttpCtsTestServer am: 63863bf446

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2388909

Change-Id: I6c9fbfb4f09e2dc19f70b001992904d9f6326272
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>