Revert "getting rid of the InternalHandler"
Revert "getting rid of the InternalHandler"

This reverts commit 4f56f65c5789763d5cfbb88837b4c01c02efd8c4.

nicolas-brugneaux-sociomantic/android_sdk,pitchtarget/adjust-android-sdk,stuffle/adjust_android_sdk,soundcloud/android_sdk,SevenVenturesGmbH/adjust_android_sdk,BlueCrystalLabs/android_sdk,trademob/android_sdk