AK3: add support for vendor_kernel_boot (#75)

META-INF/com/google/android/updater-script

@@ -3,4 +3,4 @@
 # Dummy file; update-binary is a shell script (DO NOT CHANGE)
 #
 #
-# AK_BASE_VERSION=20220827
+# AK_BASE_VERSION=20221019

tools/ak3-core.sh

@@ -513,6 +513,7 @@ write_boot() {
   repack_ramdisk;
   flash_boot;
   flash_generic vendor_boot; # temporary until hdr v4 can be unpacked/repacked fully by magiskboot
+  flash_generic vendor_kernel_boot; # temporary until hdr v4 can be unpacked/repacked fully by magiskboot
   flash_generic vendor_dlkm;
   flash_generic dtbo;
 }