Add soong variable for PRODUCT_FULL_TREBLE.

Required to preserve sane defaults for old codebases.

Test: inspect soong.variables
Test: ensure PRODUCT_SHIPPING_API_LEVEL is set in config.mk
Bug: 38415912
Merged-In: I0244fb02754663be3106391c9360fd1b2cc00d4a
Change-Id: I0244fb02754663be3106391c9360fd1b2cc00d4a
diff --git a/core/config.mk b/core/config.mk
index cd20354..f692653 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -679,6 +679,16 @@
 APICHECK_CLASSPATH := $(APICHECK_CLASSPATH):$(HOST_OUT_JAVA_LIBRARIES)/jsilver$(COMMON_JAVA_PACKAGE_SUFFIX)
 APICHECK_COMMAND := $(APICHECK) -JXmx1024m -J"classpath $(APICHECK_CLASSPATH)"
 
+# Boolean variable determining if Treble is fully enabled
+PRODUCT_FULL_TREBLE := false
+ifneq ($(PRODUCT_FULL_TREBLE_OVERRIDE),)
+  PRODUCT_FULL_TREBLE := $(PRODUCT_FULL_TREBLE_OVERRIDE)
+else ifeq ($(PRODUCT_SHIPPING_API_LEVEL),)
+  #$(warning no product shipping level defined)
+else ifneq ($(call math_gt_or_eq,$(PRODUCT_SHIPPING_API_LEVEL),26),)
+  PRODUCT_FULL_TREBLE := true
+endif
+
 # The default key if not set as LOCAL_CERTIFICATE
 ifdef PRODUCT_DEFAULT_DEV_CERTIFICATE
   DEFAULT_SYSTEM_DEV_CERTIFICATE := $(PRODUCT_DEFAULT_DEV_CERTIFICATE)
diff --git a/core/main.mk b/core/main.mk
index 54ab832..cc8d665 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -333,16 +333,6 @@
   ADDITIONAL_BUILD_PROPERTIES += ro.bionic.ld.warning=1
 endif
 
-# Boolean variable determining if Treble is fully enabled
-PRODUCT_FULL_TREBLE := false
-ifeq ($(PRODUCT_FULL_TREBLE_OVERRIDE),true)
-  PRODUCT_FULL_TREBLE := true
-else ifeq ($(PRODUCT_SHIPPING_API_LEVEL),)
-  #$(warning no product shipping level defined)
-else ifneq ($(call math_gt_or_eq,$(PRODUCT_SHIPPING_API_LEVEL),26),)
-  PRODUCT_FULL_TREBLE := true
-endif
-
 # -----------------------------------------------------------------
 ###
 ### In this section we set up the things that are different
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 576c8ab..2157ed5 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -66,6 +66,7 @@
 	echo '    "CrossHostSecondaryArch": "$(HOST_CROSS_2ND_ARCH)",'; \
 	echo '    "Safestack": $(if $(filter true,$(USE_SAFESTACK)),true,false),'; \
 	echo '    "EnableCFI": $(if $(filter true,$(ENABLE_CFI)),true,false),'; \
+	echo '    "Treble": $(if $(filter true,$(PRODUCT_FULL_TREBLE)),true,false),'; \
 	echo ''; \
 	echo '    "ArtUseReadBarrier": $(if $(filter false,$(PRODUCT_ART_USE_READ_BARRIER)),false,true),'; \
 	echo ''; \