Revert "need to understand synch task properly..  @norman norman?"

This reverts commit 01470268862d7ccd3318b019341858d1db07d8c3.
got help from...

…
https://code.google.com/p/gcm/source/browse/gcm-client/GcmClient/src/mai
n/java/com/google/android/gcm/demo/app/DemoActivity.java

thx google :-)