Add vendor_socket_hook_prop to whitelist

It's added in system's property_contexts, so it must be listed in
the whitelist.

Bug: 157274431
Test: vts_treble_sys_prop_test
Change-Id: Ia68f737e81e674d0fb4b80d7f31620a9f8df890f
Merged-In: Ia68f737e81e674d0fb4b80d7f31620a9f8df890f
(cherry picked from commit 75a3c478250b185d693b2dfd12e22f25596dffa5)
diff --git a/system_property/VtsTrebleSysPropTest.py b/system_property/VtsTrebleSysPropTest.py
index 3847990..7f0b6ed 100644
--- a/system_property/VtsTrebleSysPropTest.py
+++ b/system_property/VtsTrebleSysPropTest.py
@@ -96,7 +96,8 @@
 
     _SYSTEM_WHITELISTED_TYPES = [
             "vendor_default_prop",
-            "vendor_security_patch_level_prop"
+            "vendor_security_patch_level_prop",
+            "vendor_socket_hook_prop"
     ]
 
     _VENDOR_OR_ODM_WHITELISTED_TYPES = [
diff --git a/system_property/vts_treble_sys_prop_test.py b/system_property/vts_treble_sys_prop_test.py
index 29b7ba1..ba3d51e 100644
--- a/system_property/vts_treble_sys_prop_test.py
+++ b/system_property/vts_treble_sys_prop_test.py
@@ -154,7 +154,8 @@
 
     _SYSTEM_WHITELISTED_TYPES = [
             "vendor_default_prop",
-            "vendor_security_patch_level_prop"
+            "vendor_security_patch_level_prop",
+            "vendor_socket_hook_prop"
     ]
 
     _VENDOR_OR_ODM_WHITELISTED_TYPES = [