Added Android L animations demo

Author: Paul Ruiz

Animations/app/src/main/java/com/ptrprograms/animations/activity/MainActivity.java

@@ -50,6 +50,7 @@ public void onTransitionResume(Transition transition) {
     @Override
     protected void onDestroy() {
         super.onDestroy();
-        getWindow().getEnterTransition().removeListener( this );
+        if( getWindow() != null && getWindow().getEnterTransition() != null )
+            getWindow().getEnterTransition().removeListener( this );
     }
 }

Animations/app/src/main/java/com/ptrprograms/animations/activity/SharedElementSecondAnimationActivity.java

@@ -1,11 +1,9 @@
 package com.ptrprograms.animations.activity;
 
-import android.animation.ObjectAnimator;
 import android.app.Activity;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.os.Bundle;
-import android.util.Log;
 import android.widget.ImageView;
 
 import com.ptrprograms.animations.R;