Modified Android.bp to compile for API 24

Test: mm
Change-Id: I5b222c684ebc4fd94b5e6a7d04c648939b7d97fc
diff --git a/Android.bp b/Android.bp
index 5d05dd5..d1e8bfb 100644
--- a/Android.bp
+++ b/Android.bp
@@ -16,6 +16,7 @@
 
 java_library_static {
     name: "apkzlib_zip",
+    sdk_version: "24",
     srcs: [
         "src/main/java/com/android/tools/build/apkzlib/utils/**/*.java",
         "src/main/java/com/android/tools/build/apkzlib/zip/**/*.java",