Merge "cronet: remove inner TestUrlRequestCallback class" am: 126721cdf4

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2317225

Change-Id: Ie7f4a7479f80f1824cf933ada5bcfaef5b8f545b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>