Bug 1135678 - AS5 plugin: resources backed by ManagedComponentComponent may stay down indefinitely

Measurement requests or configuration loading may prevent the availability check to determine the ManagedComponent runState.
If the last known runState is null, get the ManagedComponent instance even if it was refreshed recently.

(cherry picked from commit 595ca3a7b2e2327a2425f5435e210c217a2cb30d)