Make mainline device enable property split

This setting moves the PRODUCT_PROPERTY_OVERRIDES to
the vendor partition.

Bug: 80410283
Test: tail system/build.prop | grep ro.carrier=
      (empty)

Change-Id: I30d564fbd2dd3b56763ccff77979b223857f1c2f
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index a0f43af..d53995c 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -6,9 +6,6 @@
 
 include build/make/target/board/BoardConfigMainlineCommon.mk
 
-# Enable system property split for Treble
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
-
 # This flag is set by mainline but isn't desired for GSI.
 BOARD_USES_SYSTEM_OTHER_ODEX :=
 
diff --git a/target/board/BoardConfigMainlineCommon.mk b/target/board/BoardConfigMainlineCommon.mk
index ed69357..fc55408 100644
--- a/target/board/BoardConfigMainlineCommon.mk
+++ b/target/board/BoardConfigMainlineCommon.mk
@@ -46,3 +46,6 @@
 # Enable A/B update
 AB_OTA_UPDATER := true
 AB_OTA_PARTITIONS := system
+
+# Enable system property split for Treble
+BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true