2ca753bd06
redundant face unlock header. 1. Change the FaceSettings theme style to avoid an action bar appearing. 2. In AndroidManifest.xml to apply configChanges attribute for handling device orientation. Bug: 262497152 Test: manually to do reproduced steps: Pre-Condition: 1. enroll face 2. enable auto rotate Procedure: 1.go to settings > security > face & fingerprint unlock 2.enter screen lock 3.click face unlock 4.rotate device into landscape mode and then back to portrait mode 5.check the UI Test: make RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings .biometrics.face.FaceSettingsActivityTest" Change-Id: I4ee1bb4f061ea2d141043405213ba6e60bacd92f