Adding android-specific customization for warning of minimum api level

Change-Id: Id211e250f3c42d0239ce9bf126a74997c8b0dc3f

tools/droiddoc/templates/assets/customizations.js

@@ -0,0 +1,11 @@
+function showApiWarning(thing, selectedLevel, minLevel) {
+  if (selectedLevel < minLevel) {
+	  $("#naMessage").show().html("<div><p><strong>This " + thing + " is not available with API Level " + selectedLevel + ".</strong></p>"
+	      + "<p>To use this " + thing + ", your application must specify API Level " + minLevel + " or higher in its manifest "
+	      + "and be compiled against a version of the Android library that supports an equal or higher API Level. To reveal this "
+	      + "document, change the value of the API Level filter above.</p>"
+	      + "<p><a href='" +toRoot+ "guide/appendix/api-levels.html'>What is the API Level?</a></p></div>");
+  } else {
+    $("#naMessage").hide();
+  }
+}