Merge "cronet: Hide old newUrlRequestBuilder" am: fafc4731ac

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2474709

Change-Id: I13e6950d4f09a2decd1158b0e5ad69feba98d93f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>