Camera: Add per-surface mirroring mode

Add the support to do per output surface mirror mode. Previously
mirroring mode is set per OutputConfiguration, which could contain
multiple shared surfaces.

Flag: com.android.internal.camera.flags.mirror_mode_shared_surfaces
Test: atest MultiViewTest
Bug: 298899993
Change-Id: I3654cb585d243365b62a10131c21a869af754e73