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/vkjson/.clang-format b/vulkan/vkjson/.clang-format
new file mode 100644
index 0000000..3f19e61
--- /dev/null
+++ b/vulkan/vkjson/.clang-format
@@ -0,0 +1 @@
+BasedOnStyle: Chromium