Target Android 5.0 instead of 4.4

Kitkat is obsolete. Some Android emulators still support Android 5, most devices are now at least Android 7 or higher.

Source/Native/jni/Application.mk

@@ -1,3 +1,3 @@
-APP_PLATFORM := android-16
+APP_PLATFORM := android-21
 APP_OPTIM := release
 APP_MODULES := libenet