Add prop for enabling system services

Added system_service_enable_prop domain for properties that could
enable/disable system services.

Bug: 340928990
Test: Local build + confirm bic not starting + presubmit
Ignore-AOSP-First: need to submit with changes in clockwork
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:09983fc534f280ac9a79f552eee5a473f2220df1)
Merged-In: Ife9041d30f10f2fbe7ab4cbcee1397901a21f0fb
Change-Id: Ife9041d30f10f2fbe7ab4cbcee1397901a21f0fb
diff --git a/private/property_contexts b/private/property_contexts
index 9b48082..601dc99 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1695,3 +1695,7 @@
 # Properties for controlling snapshotctl.
 sys.snapshotctl.map u:object_r:snapshotctl_prop:s0 exact string
 sys.snapshotctl.unmap u:object_r:snapshotctl_prop:s0 exact string
+
+# Properties for enabling/disabling system services
+ro.system_settings.service.odp_enabled   u:object_r:system_service_enable_prop:s0 exact bool
+ro.system_settings.service.backgound_install_control_enabled   u:object_r:system_service_enable_prop:s0 exact bool