Merge "Moves all compatibility flags to ConnectivityCompatChanges.java" am: 985534c95b am: efef03b0ad am: 388d610e6f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2428795

Change-Id: I4825263a0d5e5a692365eb180ab973a5d1759d7a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>