Set LOCAL_SDK_VERSION on pdk/apps/HelloPDK/jni

libhellojni_jni, referred by app HelloPDK, is a simple stub library and
does not use any platform API. HelloPDK has been built with SDK, so this
causes link-type check warnings. LOCAL_SDK_VERSION is added to
libhellojni_jni in order to remove warning.

Bug: 73907534
Test: mma -j does not show any link-type warnings
Merged-In: I188dfe9a46aedf905d2b804040bf2ad75f212b38
Change-Id: I188dfe9a46aedf905d2b804040bf2ad75f212b38
diff --git a/apps/HelloPDK/jni/Android.mk b/apps/HelloPDK/jni/Android.mk
index 6abeb83..eb0f219 100644
--- a/apps/HelloPDK/jni/Android.mk
+++ b/apps/HelloPDK/jni/Android.mk
@@ -31,6 +31,8 @@
 
 LOCAL_C_INCLUDES := $(JNI_H_INCLUDE)
 
+LOCAL_SDK_VERSION := current
+
 include $(BUILD_SHARED_LIBRARY)
 
 endif # java supproted