Use activityInfo for logo description too.

If config_useActivityLogoForBiometricPrompt contains client pacakge
name, previously we use activity info for logo icon and application info
for logo description (label). This CLs updates logo description to use
activity info too in this case.

Flag: android.hardware.biometrics.custom_biometric_prompt
Bug: 336403662
Test: manual test on test app
Test: atest PromptViewModelTest

Change-Id: I93193f671f8a417621a8185ca0eebfefa62575eb