Partition_Property_Get: Get props from additional partitions

Use the TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS flag to
specify a space-separated list of additional partitions
that should be parsed when trying to locate props
for overriding.

Example:
TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS := vendor odm

Requires TW_OVERRIDE_SYSTEM_PROPS to be defined.

Change-Id: I7baf4c15628789fe525976d9de0251bba6882395
diff --git a/Android.mk b/Android.mk
index a383895..d65930e 100755
--- a/Android.mk
+++ b/Android.mk
@@ -393,6 +393,9 @@
     TW_INCLUDE_LIBRESETPROP := true
     LOCAL_CFLAGS += -DTW_OVERRIDE_SYSTEM_PROPS=$(TW_OVERRIDE_SYSTEM_PROPS)
 endif
+ifneq ($(TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS),)
+    LOCAL_CFLAGS += -DTW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS='"$(TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS)"'
+endif
 ifneq ($(TW_INCLUDE_LIBRESETPROP),)
     LOCAL_SHARED_LIBRARIES += libresetprop
     LOCAL_C_INCLUDES += external/magisk-prebuilt/include