soong_config: Allow process-specific override of target SDK version

Change-Id: I775e852c17af12d2233e644e3db10c10bcb20d19
Signed-off-by: Jackeagle <jackeagle102@gmail.com>
diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index 1ef2e56..c11ec95 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -22,6 +22,9 @@
 		Cppflags []string
 		Shared_libs []string
 	}
+	Target_process_sdk_version_override struct {
+		Cppflags []string
+	}
 }
 
 type ProductVariables struct {
@@ -33,4 +36,5 @@
 	Uses_nvidia_enhancements  *bool `json:",omitempty"`
 	Uses_qcom_bsp_legacy  *bool `json:",omitempty"`
 	Uses_qti_camera_device  *bool `json:",omitempty"`
+ 	Target_process_sdk_version_override *string `json:",omitempty"`
 }
diff --git a/build/soong/soong_config.mk b/build/soong/soong_config.mk
index c5eab3f..40266f2 100644
--- a/build/soong/soong_config.mk
+++ b/build/soong/soong_config.mk
@@ -11,6 +11,7 @@
 $(call add_json_bool, Uses_nvidia_enhancements,              $(filter TRUE,$(NV_ANDROID_FRAMEWORK_ENHANCEMENTS)))
 $(call add_json_bool, Uses_qcom_bsp_legacy,                  $(filter true,$(TARGET_USES_QCOM_BSP_LEGACY)))
 $(call add_json_bool, Uses_qti_camera_device,                $(filter true,$(TARGET_USES_QTI_CAMERA_DEVICE)))
+$(call add_json_str_omitempty, Target_process_sdk_version_override, $(TARGET_PROCESS_SDK_VERSION_OVERRIDE))
 
 # This causes the build system to strip out the last comma in our nested struct, to keep the JSON valid.
 _contents := $(_contents)__SV_END