Call registerConnectivityModuleHealthListener in platform

PackageWatchdog is being moved to a CrashRecovery module.
Use registerConnectivityModuleHealthListener from CrashRecoveryHelper to explicitly register for network errors.

Bug: 338468233
Test: TH
Flag: android.crashrecovery.flags.refactor_crashrecovery
Change-Id: I6a72e0c869f886c9e6aa402064a3c5dc6e3f3e2d