Add userspace_reboot_log_prop

This properties are used to compute UserspaceRebootAtom and are going to
be written by system_server. Also removed now unused
userspace_reboot_prop.

Test: builds
Bug: 148767783
Change-Id: Iee44b4ca9f5d3913ac71b2ac6959c232f060f0ed
diff --git a/private/property_contexts b/private/property_contexts
index 07fbe7a..1197de3 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -22,7 +22,6 @@
 hw.                     u:object_r:system_prop:s0
 ro.hw.                  u:object_r:system_prop:s0
 sys.                    u:object_r:system_prop:s0
-sys.init.userspace_reboot   u:object_r:userspace_reboot_prop:s0
 sys.init.perf_lsm_hooks u:object_r:init_perf_lsm_hooks_prop:s0
 sys.cppreopt            u:object_r:cppreopt_prop:s0
 sys.linker.             u:object_r:linker_prop:s0
@@ -232,3 +231,7 @@
 # Module properties
 com.android.sdkext.                  u:object_r:module_sdkextensions_prop:s0
 persist.com.android.sdkext.          u:object_r:module_sdkextensions_prop:s0
+
+# Userspace reboot properties
+sys.userspace_reboot.log.         u:object_r:userspace_reboot_log_prop:s0
+persist.sys.userspace_reboot.log. u:object_r:userspace_reboot_log_prop:s0