Add alternate bouncer UDFPS rotation support

The alternate bouncer can show over an occluding application.
In this case, the alternate bouncer may be requested in
different orientations. Add support for the UDFPS icon in
the alternate bouncer to support different rotations.

This adds support for landscape and seascape but doesn't
support upside down because UdfpsOverlayParams doesn't
support upside down yet.

This CL also updates a11y announcements for UDFPS.

Bug: 330880858
Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor TRUNKFOOD
Test: atest UdfpsUtilsTest
Test: with udfps enrolled and auto-rotate enabled, double press
the power button to navigate to the camera app from the lockscreen. Tap
the gallery icon and then rotate. Observe UDFPS icon is visible and
user can auth from seascape and landscape.

Change-Id: I63018579c118323d7721cd94486f14e4362df196