settings: Set explicit intent for legal info

This CL sets the full component for the Settings intent that opens
"Legal information->Third-party...".

Bug: 300111126
Test: make -j64 SettingsRoboTests
Test: create ika environment, manually open legal info.
Flag: EXEMPT bug fix

Change-Id: I3169620c0f2ff78a39b456597384a9738bc38a9f