Android: Added missing import statement.

It did not compile without.

android-project/src/org/libsdl/app/SDLActivity.java

@@ -11,6 +11,7 @@ import java.lang.reflect.Method;
 
 import android.app.*;
 import android.content.*;
+import android.text.InputType;
 import android.view.*;
 import android.view.inputmethod.BaseInputConnection;
 import android.view.inputmethod.EditorInfo;