Make cst-device-info to compile with new vkjson

LOCAL_SDK_VERSION := 24 will cause 'make cts' to fail on compiling
native code of cts-device-info without new references introduced at 28

Bug: b/38269556
Test: make cts
Test: adb shell cmd gpu vkjson
Change-Id: I3c2c0ab70cbfb0a82b0305f3cab72f75ce0f89f4
diff --git a/tools/cts-device-info/jni/Android.mk b/tools/cts-device-info/jni/Android.mk
index 9e514f0..5786c20 100644
--- a/tools/cts-device-info/jni/Android.mk
+++ b/tools/cts-device-info/jni/Android.mk
@@ -30,7 +30,6 @@
 
 LOCAL_CFLAGS := -Wall -Werror
 
-# Would be "current" if that was supported for native code.
-LOCAL_SDK_VERSION := 24
+LOCAL_SDK_VERSION := current
 
 include $(BUILD_SHARED_LIBRARY)