auto-disabling not supported android features

scripts/function-android.sh

@@ -404,10 +404,13 @@ get_common_linked_libraries() {
 
   case $1 in
   ffmpeg)
-    if [[ -z ${FFMPEG_KIT_LTS_BUILD} ]]; then
+
+    # SUPPORTED ON API LEVEL 24 AND LATER
+    if [[ ${API} -ge 24 ]]; then
       echo "-lc -lm -ldl -llog -lcamera2ndk -lmediandk ${COMMON_LIBRARY_PATHS}"
     else
       echo "-lc -lm -ldl -llog ${COMMON_LIBRARY_PATHS}"
+      echo -e "INFO: Building ffmpeg without native camera API which is not supported on Android API Level ${API}\n" 1>>"${BASEDIR}"/build.log 2>&1
     fi
     ;;
   libvpx)