docs: fix broken links

Change-Id: Ic2ca7a3ae1d8283d2b101028c5782159d822d98f

Author: scottamain

docs/html/guide/practices/index.jd

@@ -10,7 +10,7 @@ page.landing.image=
   <div class="col-12">
     <h3>Blog Articles</h3>
 
-    <a href="android-developers.blogspot.com/2010/10/improving-app-quality.html">
+    <a href="http://android-developers.blogspot.com/2010/10/improving-app-quality.html">
       <h4>Improving App Quality</h4>
       <p>One way of improving your app’s visibility in the ecosystem is by deploying well-targeted
 mobile advertising campaigns and cross-app promotions. However, there’s another time-tested method
@@ -23,15 +23,15 @@ of fueling the impression-install-ranking cycle: improve the product!</p>
 your designs to the action bar in order to promote a consistent Android user experience.</p>
     </a>
 
-    <a href="android-developers.blogspot.com/2011/07/new-tools-for-managing-screen-sizes.html">
+    <a href="http://android-developers.blogspot.com/2011/07/new-tools-for-managing-screen-sizes.html">
       <h4>New Tools For Managing Screen Sizes</h4>
       <p>Android 3.2 includes new tools for supporting devices with a wide range of screen sizes.
 One important result is better support for a new size of screen; what is typically called a “7-inch”
 tablet. This release also offers several new APIs to simplify developers’ work in adjusting to
 different screen sizes.</p>
     </a>
 
-    <a href="android-developers.blogspot.com/2011/03/identifying-app-installations.html">
+    <a href="http://android-developers.blogspot.com/2011/03/identifying-app-installations.html">
       <h4>Identifying App Installations</h4>
       <p>It is very common, and perfectly reasonable, for a developer to want to track individual
 installations of their apps. It sounds plausible just to call TelephonyManager.getDeviceId() and use