Merge "cronet: Fix some MissingNullability API lineter issues" am: 8725ce2d0e am: 4115bb07ea am: 67c852ba42

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2412092

Change-Id: Ic8ae814ddc88ba73206c0bc475b45d1971a6cebd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>