Merge "Move the Thread proguard flags to ConnectivityService's proguard.flags" into main am: 96361bc4cd am: 857300d79d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2926180

Change-Id: Ib89449cdc20caca2b99c87299d85844ba1906978
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>