Attempt to make us not crash on KitKat.

sky/shell/org/domokit/sky/shell/SkyActivity.java

Index: sky/shell/org/domokit/sky/shell/SkyActivity.java
diff --git a/sky/shell/org/domokit/sky/shell/SkyActivity.java b/sky/shell/org/domokit/sky/shell/SkyActivity.java
index e37114d64835c92c96afc130d1e7075cc48bccd6..28226391ed10b2d2f2041a1da6d0389ad42c9cfe 100644
--- a/sky/shell/org/domokit/sky/shell/SkyActivity.java
+++ b/sky/shell/org/domokit/sky/shell/SkyActivity.java
@@ -5,6 +5,7 @@
 package org.domokit.sky.shell;
 
 import android.app.Activity;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.View;
 import android.view.WindowManager;
@@ -24,7 +25,9 @@ public class SkyActivity extends Activity {
 
         getWindow().addFlags(
                 WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
-        getWindow().setStatusBarColor(0x40000000);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            getWindow().setStatusBarColor(0x40000000);
+        }
         getWindow().getDecorView().setSystemUiVisibility(
                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);