AI 146646: am: CL 146645 am: CL 146643 Clean up and commenting of the JetBoy JET demo code:

Fixed JetPlayer initialization code and pause when the app loses focus.
  Removed mute mask hack.
  Cleaned up event ID declaration and check (event value is a byte, not a String).
  Add extensive comments for the JetPlayer code.
  Original author: jmtrivi
  Merged from: //branches/cupcake/...
  Original author: android-build

Automated import of CL 146646

samples/JetBoy/src/com/example/android/jetboy/JetBoy.java

@@ -14,7 +14,8 @@
  * limitations under the License.
  */
 
-// FIXME: review and cleanup
+// Android JET demonstration code:
+// See the JetBoyView.java file for examples on the use of the JetPlayer class.
 
 package com.example.android.jetboy;
 
@@ -79,6 +80,7 @@ public class JetBoy extends Activity implements View.OnClickListener {
 
         mJetBoyView.SetTextView(mTextView);
     }
+    
 
     /**
      * Handles component interaction