FP3: Move fingerprint feature flag to system

Avoid declaring fingerprint feature on GSI where it doesn't work
properly.

Issue: FP3-A12#23
Test: run cts-on-gsi -m CtsHardwareTestCases -t android.hardware.biometrics.cts.BiometricManagerTest#test_getSettingName_forBiometrics
Test: run cts-on-gsi -m CtsHardwareTestCases -t android.hardware.fingerprint.cts.FingerprintManagerTest#test_hasFingerprintHardware
Change-Id: I82e16bebde52439c0e9e98589ae5a006ca97ed41