[OnePlus Nord ROMs, Kernels, Recoveries, & Other De] AmolAmrit:
I tried to fix the OOS Camera HAL SELinux policy on pre-built trees but I failed at them. Any help would be appreciated, link for my sources are mentioned in the OP. Also, I am attaching denials. I have issues with compiling those policies.

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:384): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_sensors_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
logcat_11-08-2021_13-26-42.txt:avc: denied { find } for pid=2139 uid=10202 name=ParamService scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:oem_service:s0 tclass=service_manager permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:385): avc: denied { read } for comm=43616D657261206465766963652074 name="u:object_r:vendor_persist_camera_prop:s0" dev="tmpfs" ino=14954 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_persist_camera_prop:s0 tclass=file permissive=0 app=com.oneplus.camera

logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.oneplus.hardware.camera::IOnePlusCameraProvider sid=u:r:system_server:s0 pid=1023 scontext=u:r:system_server:s0 tcontext=u:object_r:hal_cameraHIDL_hwservice:s0 tclass=hwservice_manager permissive=0
logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.oneplus.hardware.camera::IOnePlusCameraProvider sid=u:r:system_server:s0 pid=1023 scontext=u:r:system_server:s0 tcontext=u:object_r:hal_cameraHIDL_hwservice:s0 tclass=hwservice_manager permissive=0

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:386): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:387): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0

logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.qti.qspmhal::IQspmhal sid=u:r:hal_camera_default:s0 pid=819 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:vendor_hal_qspmhal_hwservice:s0 tclass=hwservice_manager permissive=0

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:388): avc: denied { search } for comm=446576696365207374617465206D61 name="battery" dev="sysfs" ino=71852 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_sysfs_battery_supply:s0 tclass=dir permissive=0 app=com.oneplus.camera

logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.qti.hardware.camera.postproc::IPostProcService sid=u:r:untrusted_app:s0:c202,c256,c512,c768 pid=6018 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_hal_camera_postproc_hwservice:s0 tclass=hwservice_manager permissive=0
logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.qti.hardware.camera.postproc::IPostProcService sid=u:r:untrusted_app:s0:c202,c256,c512,c768 pid=6006 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_hal_camera_postproc_hwservice:s0 tclass=hwservice_manager permissive=0

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:389): avc: denied { read } for name="lib_oneplus_transparenteffect.so" dev="dm-9" ino=2521 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_file:s0 tclass=file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:390): avc: denied { read } for comm=5363656E6520636C61737369666965 name="gpu_available_frequencies" dev="sysfs" ino=71191 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_sysfs_kgsl:s0 tclass=file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:391): avc: denied { read } for comm=5363656E6520636C61737369666965 name="adsprpc-smd-secure" dev="tmpfs" ino=27763 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_xdsp_device:s0 tclass=chr_file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:392): avc: denied { search } for comm=5363656E6520636C61737369666965 name="/" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:394): avc: denied { search } for comm=5363656E6520636C61737369666965 name="/" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:410): avc: denied { read } for comm=43616D657261206465766963652074 name="u:object_r:vendor_persist_camera_prop:s0" dev="tmpfs" ino=14954 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_persist_camera_prop:s0 tclass=file permissive=0 app=com.oneplus.camera

logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.oneplus.hardware.camera::IOnePlusCameraProvider sid=u:r:system_server:s0 pid=1023 scontext=u:r:system_server:s0 tcontext=u:object_r:hal_cameraHIDL_hwservice:s0 tclass=hwservice_manager permissive=0

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:411): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:412): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0

logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:413): avc: denied { read } for name="adsprpc-smd-secure" dev="tmpfs" ino=27763 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:vendor_xdsp_device:s0 tclass=chr_file permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:414): avc: denied { search } for name="camera" dev="sda2" ino=96 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:oem_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:415): avc: denied { read } for comm=43616D657261206465766963652074 name="u:object_r:vendor_persist_camera_prop:s0" dev="tmpfs" ino=14954 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_persist_camera_prop:s0 tclass=file permissive=0 app=com.oneplus.camera

logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.oneplus.hardware.camera::IOnePlusCameraProvider sid=u:r:system_server:s0 pid=1023 scontext=u:r:system_server:s0 tcontext=u:object_r:hal_cameraHIDL_hwservice:s0 tclass=hwservice_manager permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:416): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14780 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.qti.qspmhal::IQspmhal sid=u:r:hal_camera_default:s0 pid=819 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:vendor_hal_qspmhal_hwservice:s0 tclass=hwservice_manager permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:418): avc: denied { read } for name="lib_oneplus_transparenteffect.so" dev="dm-9" ino=2521 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_file:s0 tclass=file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:avc: denied { find } for interface=vendor.qti.qspmhal::IQspmhal sid=u:r:hal_camera_default:s0 pid=819 scontext=u:r:hal_camera_default:s0 tcontext=u:object_r:vendor_hal_qspmhal_hwservice:s0 tclass=hwservice_manager permissive=0
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:419): avc: denied { read } for name="gpu_available_frequencies" dev="sysfs" ino=71191 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_sysfs_kgsl:s0 tclass=file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:420): avc: denied { read } for name="adsprpc-smd-secure" dev="tmpfs" ino=27763 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:vendor_xdsp_device:s0 tclass=chr_file permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:421): avc: denied { search } for name="/" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:422): avc: denied { search } for name="/" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:423): avc: denied { search } for name="/" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera
logcat_11-08-2021_13-26-42.txt:type=1400 audit(0.0:424): avc: denied { getattr } for path="/vendor/dsp" dev="sde32" ino=2 scontext=u:r:untrusted_app:s0:c202,c256,c512,c768 tcontext=u:object_r:adsprpcd_file:s0 tclass=dir permissive=0 app=com.oneplus.camera