Revert "Call Receivers in a separate thread"

This reverts commit 48fe86b36ee320fd162d798a85bf53a1ff07eaac.
Revert "Change protocol for setInstallReferrer"

This reverts commit 3d891ff4b49091181da34fd9a382f7c1ae81f26a.
Revert "add reciever code"

This reverts commit e37f9e212e25b915a39b32bf10bff6d6ffde21c1.