soong: Add `aapt_version_code` default

This appends `--version_code=$(date -u +%Y%m%d)` to aapt flags, which is
useful for flushing some caches upon system updates.

Change-Id: I6575b878f09c1c3138e12abc34d39405f51245e7
Signed-off-by: Omkar Chandorkar <gotenksIN@aospa.co>

soong/Android.bp

@@ -154,3 +154,23 @@ uses_miui_camera {
         },
     },
 }
+
+soong_config_module_type {
+    name: "aapt_version_code",
+    module_type: "java_defaults",
+    config_namespace: "aospaGlobalVars",
+    value_variables: ["aapt_version_code"],
+    properties: ["aaptflags"],
+}
+
+aapt_version_code {
+    name: "aapt_version_code_defaults",
+    soong_config_variables: {
+        aapt_version_code: {
+            aaptflags: [
+                "--version-code",
+                "%s",
+            ],
+        },
+    },
+}

target/board/BoardConfigSoong.mk

@@ -17,6 +17,7 @@ $(foreach v,$(EXPORT_TO_SOONG),$(eval $(call addVar,$(v))))
 
 SOONG_CONFIG_NAMESPACES += aospaGlobalVars
 SOONG_CONFIG_aospaGlobalVars += \
+    aapt_version_code \
     needs_camera_boottime \
     powershare_node \
     target_init_vendor_lib \
@@ -32,6 +33,7 @@ TARGET_INIT_VENDOR_LIB ?= vendor_init
 TARGET_SURFACEFLINGER_UDFPS_LIB ?= surfaceflinger_udfps_lib
 
 # Soong value variables
+SOONG_CONFIG_aospaGlobalVars_aapt_version_code := $(shell date -u +%Y%m%d)
 SOONG_CONFIG_aospaGlobalVars_needs_camera_boottime := $(TARGET_CAMERA_BOOTTIME_TIMESTAMP)
 SOONG_CONFIG_aospaGlobalVars_powershare_node := $(TARGET_POWERSHARE_NODE)
 SOONG_CONFIG_aospaGlobalVars_target_init_vendor_lib := $(TARGET_INIT_VENDOR_LIB)