Update BiometricPrompt sfps assets and remove overlay

Consolidating BiometricPrompt icon and overlay into one asset for SFPS,
updating asset logic, and replacing existing assets with new assets

Flag: EXEMPT asset update only
Fixes: 343383113
Fixes: 350121748
Test: atest PromptViewModelTest
Test: atest -c --request-upload-result SystemUIGoogleScreenshotTests:com.android.systemui.biometrics.ui.BiometricPromptScreenshotTest
Test: atest SystemUIGoogleRobo2RNGTests:BiometricPromptScreenshotTest
Change-Id: I0f1d5392c3661bb271e3456259ea35cbefaadf7e