Keep primitive members used by MessageUtils. am: 88edc35d am: 9267f67d am: fa1f397c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2238573



Change-Id: If2ca61e58b479e3d9c27ee924f545a886fffaf99
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>