Add onUdfpsUiEvent() and callbacks on overlay shown in FingerprintManager.

This CL renames onUiReady() to onUdfpsUiEvent() for the event of overlay
shown in FingerprintManager and notifies the mService for calling
corresponding callbacks.

Bug: 280718879
Test: atest UdfpsControllerTest
Change-Id: Ifcd11becb75d81259215d24172636f8f7bb7b6ee
19 files changed