Use the custom name in the battery attribution if it is unknown item

Keep the queried name is null to use the custom provided battery attribution name (avoid to replace it with POWER_COMPONENT_ prefix name), such that we can show "TPU", "GPU" ... attribution.

old screenshot: https://screenshot.googleplex.com/8KGNxW2eHFY85zw
new screenshot: https://screenshot.googleplex.com/8KVj3jBjShfa8wK


Bug: 227749579
Test: make RunSettingsRoboTests
Change-Id: I22fba3c252a92f7d64670ad5d0f6f3548374968a