NovaLauncher: update to version 3.1

Change-Id: I68621991729b41c6e683726ff11611e5c048b5a5
diff --git a/prebuilt/common/app/NovaLauncher.apk b/prebuilt/common/app/NovaLauncher.apk
index ac4f650..eb588f9 100644
--- a/prebuilt/common/app/NovaLauncher.apk
+++ b/prebuilt/common/app/NovaLauncher.apk
Binary files differ