Add HEIC_ULTRAHDR image format

Flag: com.android.internal.camera.flags.camera_heif_gainmap
Bug: 362608343
Test: atest -c -d cts/tests/camera/src/android/hardware/camera2/cts/ImageReaderTest.java#testHeicUltraHdr

Change-Id: Icefca1f6e1676b776a0b083fc7f6f8224cb72762