sm6375-common: Introduce a stub blair-post-boot script

This will be used to tune some parameters in the device. Only run
this script after proprietary kernel post-boot has run, so that
these changes are not overriden by the same.

Change-Id: Ibcef27a2813870c62d54c9d762eae9e03da677ad
Signed-off-by: Vaisakh Murali <mvaisakh@statixos.com>

rootdir/bin/init.blair.post_boot.sh

@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2023 StatiXOS
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# Custom tuning for Blair SoC
+

rootdir/etc/init/hw/init.target.rc

@@ -162,3 +162,13 @@ on property:init.svc.vendor.per_mgr=running
 
 on property:sys.shutdown.requested=*
     stop vendor.per_proxy
+
+service blair-post-boot /vendor/bin/sh /vendor/bin/init.blair.post_boot.sh
+    class late_start
+    user root
+    group root system wakelock graphics
+    disabled
+    oneshot
+
+on property:vendor.post_boot.parsed=1
+    start blair-post-boot

sepolicy/vendor/file_contexts

@@ -61,6 +61,9 @@
 # IFAA
 /(vendor|system/vendor)/bin/hw/vendor\.zui\.hardware\.ifaa@1\.0-service                 u:object_r:hal_ifaa_default_exec:s0
 
+# Init
+/vendor/bin/init.blair.post_boot.sh          u:object_r:vendor_qti_init_shell_exec:s0
+
 # Label read_ahead_kb in /data partition
 /sys/devices/platform/soc/1d84000.ufshc/host0/target0:0:0/0:0:0:0/block/sda/queue/read_ahead_kb u:object_r:vendor_sysfs_scsi_host:s0