libvkjson: Use shared libjsoncpp

This reduces the size of libvkjson from 338248 to 141648.
(aosp_cf_x86_64_phone)

Bug: n/a
Test: adb shell cmd gpu vkjson
Change-Id: I41dcc4329099fc4ac7a5857d0c20284f6776469e
diff --git a/vulkan/vkjson/Android.bp b/vulkan/vkjson/Android.bp
index b6d3a0b..b544245 100644
--- a/vulkan/vkjson/Android.bp
+++ b/vulkan/vkjson/Android.bp
@@ -25,10 +25,8 @@
         ".",
     ],
     shared_libs: [
-        "libvulkan",
-    ],
-    whole_static_libs: [
         "libjsoncpp",
+        "libvulkan",
     ],
     export_shared_lib_headers: [
         "libvulkan",