Verify that FlagReset is triggered during bootloop

Add unit tests to assert that when the right set of flags are enabled,
DeviceConfig#resetToDefaults is triggered during mitigation of bootloop.

Bug: 397776123
Test: atest RescuePartyTest
Flag: com.android.crashrecovery.flags.flag_reset_enabled
Change-Id: Id03692bd68cf73643b7c2821821bd52e6cdb95d5