Improve dumpsys for installed distros

The RuleManagerService would previously refuse to return
the current distro install status if there was a staging
operation in progress. Since a staging operation only affects
what is staged, not what is actually installed, this
restriction can be relaxed. This should make tests that
were previously getting "Unknown" state more reliable.

Test: PTS: run pts -m PtsTimeZoneTestCases
Test: atest FrameworksServicesTests
Change-Id: I06449bc8dad6d96adf7e9edceee69cfaf24facb0