Add recoverability detection to RescueParty and PackageWatchdog

PackageWatchdog will apply high user impact actions only in case of
network failure.

RescueParty updated the list of rescue levels and their corresponding
impact.

Test: unit and manual tests
Bug: 310236690
Change-Id: Iff34f6051b801a0d45149c317a7c9f344a2bd984