Revert "cronet: update prebuilts to 107.0.5284.2" am: b8c4d970db am: 15670d4c96

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Cronet/+/2231750

Change-Id: I66d7ef79ceb82952f291bbe26cf5029c819afdf9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>