Organize product vars for adding properties

Properties for <partition>/build.prop are now added via
PRODUCT_<PARTITION>_PROPERTIES.

PRODUCT_SYSTEM_PROPERTIES is added. PRODUCT_SYSTEM_DEFAULT_PROPERTIES
will be deprecated.

PRODUCT_VENDOR_PROPERTIES is added. PRODUCT_PROPERTY_OVERRIDES and
PRODUCT_DEFAULT_PROPERTY_OVERRIDES will be deprecated in favor of the new
variable.

For other partitions (odm, system_ext, product), there is no change.

Exempt-From-Owner-Approval: cherry-pick from internal master

Bug: 117892318
Test: m
Merged-In: I98f3b5d0da661b3ad75260a23754e655103b7a44
(cherry picked from commit ad810b6dae32a42a828dfbddcaeec89f295d695e)
Change-Id: I98f3b5d0da661b3ad75260a23754e655103b7a44
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index 49f6edc..0f36aae 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -58,7 +58,7 @@
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
 
-# Setup a vendor image to let PRODUCT_PROPERTY_OVERRIDES does not affect GSI
+# Setup a vendor image to let PRODUCT_VENDOR_PROPERTIES does not affect GSI
 BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
 
 # Disable 64 bit mediadrmserver