[Mainline] Copy the findBestComponent method from EuiccConnector to Settings

Make a copy of EuiccConnector#findBestComponent() into local method findEuiccService().

Bug: 147275124
Test: make RunSettingsRoboTests ROBOTEST_FILTER=ApplicationFeatureProviderImplTest
Change-Id: Ie81569d940fc354053469570e1506b1954d9f24d
2 files changed