Move vkjson into framework/native/vulkan

LVL upstream will re-organize the folders in external/LVL and will get
rid of vkjson. Thus need to move vkjson here to accordingly.

Test: adb shell cmd gpu vkjson
Bug: b/77613206
Change-Id: I5dac0c2c3a4e1d7dae8adda01cf4f2712a132469
diff --git a/vulkan/Android.bp b/vulkan/Android.bp
index a49b6dd..b15bed9 100644
--- a/vulkan/Android.bp
+++ b/vulkan/Android.bp
@@ -55,4 +55,5 @@
     "nulldrv",
     "libvulkan",
     "tools",
+    "vkjson",
 ]